Steps:
1. Enable DLSS in-game
2. Start a cutscene / NPC dialogue
3. Observe that DLSS does not seem to be working properly

Note: others have reported this bug as well on technical support forum, and elsewhere on Reddit.
https://forum.square-enix.com/ffxiv/...24-DLSS-Issues


■ PC Specs

To obtain the system information, open the FFXIV launcher and select Config → System Information → Display.

-=-=-=-=-=-=- System Information -=-=-=-=-=-=-

SYSTEM_OS Windows 11 Pro 64-bit (6.2, Build 9200) (22621.ni_release.220506-1250)
SYSTEM_CPU AMD Ryzen 9 7950X3D 16-Core Processor (32 CPUs), ~4.2GHz
SYSTEM_CORE_NUM SYSTEM_CORE_LOGIC 32 SYSTEM_CORE_PHYSICS 16
SYSTEM_BIOS F24c
SYSTEM_LANGUAGE English (Regional Setting: English)
SYSTEM_MEMORY 64661.359MB
SYSTEM_VIRTUAL_MEMORY 134217727.875MB
SYSTEM_PAGE_FILE 66413.625MB
SYSTEM_STORAGE C:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 953.106GB SYSTEM_FREEDISC_SPACE 236.695GB
SYSTEM_STORAGE E:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 953.868GB SYSTEM_FREEDISC_SPACE 163.008GB
SYSTEM_STORAGE G:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 15.000GB SYSTEM_FREEDISC_SPACE 14.888GB
SYSTEM_STORAGE N:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 107918.758GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE O:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 157754.461GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE P:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 102539.596GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE Q:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 120946.970GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE R:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 121063.946GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE S:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 102591.851GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE T:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 102342.159GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE U:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 103002.803GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE V:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 102339.773GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE W:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 102326.433GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE X:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 102336.531GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE Y:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 102336.143GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_STORAGE Z:\ SYSTEM_NETWORK_DRIVE SYSTEM_TOTALDISC_SPACE 102324.184GB SYSTEM_FREEDISC_SPACE 102324.183GB
SYSTEM_DIRECTX_VERSION DirectX 12
SYSTEM_GRAPHICS NVIDIA GeForce RTX 4090
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY6
SYSTEM_GRAPHICS_CHIP NVIDIA GeForce RTX 4090
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 24142.000 MB
SYSTEM_GRAPHICS_SHARED_VRAM 32330.680 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 2560 x 1440 (32 bit) (144Hz)
SYSTEM_GRAPHICS_DRIVER C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 32.00.0015.5612
SYSTEM_GRAPHICS_DRIVER_DATE 6/24/2024 18:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_GRAPHICS NVIDIA GeForce RTX 4090
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY7
SYSTEM_GRAPHICS_CHIP NVIDIA GeForce RTX 4090
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 24142.000 MB
SYSTEM_GRAPHICS_SHARED_VRAM 32330.680 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 3440 x 1440 (32 bit) (175Hz)
SYSTEM_GRAPHICS_DRIVER C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 32.00.0015.5612
SYSTEM_GRAPHICS_DRIVER_DATE 6/24/2024 18:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_GRAPHICS NVIDIA GeForce RTX 4090
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY8
SYSTEM_GRAPHICS_CHIP NVIDIA GeForce RTX 4090
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 24142.000 MB
SYSTEM_GRAPHICS_SHARED_VRAM 32330.680 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 1920 x 1080 (32 bit) (60Hz)
SYSTEM_GRAPHICS_DRIVER C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nvmdi.inf_amd64_206887a3f4130317\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 32.00.0015.5612
SYSTEM_GRAPHICS_DRIVER_DATE 6/24/2024 18:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_GRAPHICS Microsoft Basic Display Adapter
SYSTEM_GRAPHICS_DEVICE Unknown
SYSTEM_GRAPHICS_CHIP Unknown
SYSTEM_GRAPHICS_MAKER (Standard display types)
SYSTEM_GRAPHICS_VRAM Unknown
SYSTEM_GRAPHICS_SHARED_VRAM SYSTEM_UNKNOWN
SYSTEM_GRAPHICS_DAC Unknown
SYSTEM_GRAPHICS_DISPLAY_MODE Unknown
SYSTEM_GRAPHICS_DRIVER c:\windows\system32\driverstore\filerepository\basicdisplay.inf_amd64_02da009b3d736cc1\basicdisplay.sys
SYSTEM_GRAPHICS_DRIVER_VERSION 6.02.22621.0001
SYSTEM_GRAPHICS_DRIVER_DATE 6/20/2006 18:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English

SYSTEM_GRAPHICS_PIXEL_SHADER
SYSTEM_GRAPHICS_VERTEX_TEXTURE
SYSTEM_SOUND CABLE Input (VB-Audio Virtual Cable)
SYSTEM_SOUND_DEVICE_ID {1BA2B721-C1B3-42B7-AAA4-EE87E42D40B6}
SYSTEM_SOUND_DEVICE_NAME vbaudio_cable64_win7.sys
SYSTEM_SOUND_DRIVER_VERSION 1.0.3.5
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 9/1/2014 18:00:00
SYSTEM_SOUND Headphones (Oculus Virtual Audio Device)
SYSTEM_SOUND_DEVICE_ID {9E265DEE-09A2-4B09-800D-C77F2EB46D55}
SYSTEM_SOUND_DEVICE_NAME oculusvad.sys
SYSTEM_SOUND_DRIVER_VERSION 13.3.46.740
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 2/10/2021 18:00:00
SYSTEM_SOUND Headphones (Rift Audio)
SYSTEM_SOUND_DEVICE_ID {29425594-147D-4967-949C-4527A5F4EF07}
SYSTEM_SOUND_DEVICE_NAME OCULUS119B.sys
SYSTEM_SOUND_DRIVER_VERSION 10.0.1.54
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 3/13/2016 18:00:00
SYSTEM_SOUND Out 1-2 (2- MOTU M Series)
SYSTEM_SOUND_DEVICE_ID {D471F303-BE9B-4AEC-91E6-D4E97BD9821F}
SYSTEM_SOUND_DEVICE_NAME MOTUCoreUAC.sys
SYSTEM_SOUND_DRIVER_VERSION 4.0.9.2462
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 11/10/2022 18:00:00
SYSTEM_SOUND Speakers (3- JDS Labs Element II)
SYSTEM_SOUND_DEVICE_ID {13343DC1-AB45-4417-A0F1-BD8D0BA7410D}
SYSTEM_SOUND_DEVICE_NAME JDSLabsUsbAudioks.sys
SYSTEM_SOUND_DRIVER_VERSION 5.57.0.26622
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 2/22/2023 18:00:00
SYSTEM_SOUND VoiceMeeter Input (VB-Audio VoiceMeeter VAIO)
SYSTEM_SOUND_DEVICE_ID {89EDD01A-4CF7-4E8D-B958-53C42939755D}
SYSTEM_SOUND_DEVICE_NAME vbaudio_vmvaio64_win10.sys
SYSTEM_SOUND_DRIVER_VERSION 2.1.5.2
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 1/10/2019 18:00:00
SYSTEM_INPUT {6F1D2B60-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 3 SYSTEM_GAMEPAD_BUTTON 8 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {6F1D2B61-D5A0-11CF-BFC7444553540000}
SYSTEM_INPUT_NAME Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 128 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {80EB9430-145D-11ED-8002444553540000}
SYSTEM_INPUT_NAME Corsair composite virtual input device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 1024 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {5CEC49D0-7E0C-11ED-8001444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {5CEC97F0-7E0C-11ED-8002444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BF9FBA20-09FF-11ED-8001444553540000}
SYSTEM_INPUT_NAME Rift
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 1 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFA0F2A0-09FF-11ED-8004444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 767 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {64DE5070-1386-11ED-8001444553540000}
SYSTEM_INPUT_NAME TRIPPLITE UPS
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFA140C0-09FF-11ED-8006444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFA02F50-09FF-11ED-8003444553540000}
SYSTEM_INPUT_NAME HID-compliant consumer control device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 4096 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFA1B5F0-09FF-11ED-8008444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFA140C0-09FF-11ED-8005444553540000}
SYSTEM_INPUT_NAME HID-compliant vendor-defined device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFA1B5F0-09FF-11ED-8009444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFA1B5F0-09FF-11ED-8007444553540000}
SYSTEM_INPUT_NAME HID-compliant vendor-defined device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {4AE934B0-5552-11ED-8001444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 767 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {4AE95BC0-5552-11ED-8002444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {4AE982D0-5552-11ED-8003444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFA27940-09FF-11ED-800C444553540000}
SYSTEM_INPUT_NAME Rift
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 1 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {4AE9A9E0-5552-11ED-8004444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {668B1280-C571-11ED-8001444553540000}
SYSTEM_INPUT_NAME ITE Device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFA2C760-09FF-11ED-800D444553540000}
SYSTEM_INPUT_NAME HID-compliant vendor-defined device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {1408B4F0-2D72-11ED-8001444553540000}
SYSTEM_INPUT_NAME Rift Audio
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 1 SYSTEM_GAMEPAD_BUTTON 5 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {668B3990-C571-11ED-8002444553540000}
SYSTEM_INPUT_NAME ITE Device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {5CECBF00-7E0C-11ED-8003444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 767 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {BFA27940-09FF-11ED-800B444553540000}
SYSTEM_INPUT_NAME USB Audio Device
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 1 SYSTEM_GAMEPAD_BUTTON 5 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {5CECE610-7E0C-11ED-8004444553540000}
SYSTEM_INPUT_NAME USB Receiver
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-