Audio delay when fighting in large groups (24man raids, hunts, etc)

Date & Time: May 24, 2018 at 22:00:00GMT
Frequency: Every fight involving ~8 or more players
World name: Excalibur
Character name: Star Fist
Retainer name: n/a
NPC name: n/a
Monster name: n/a
Class/Level: NIN/70
Party or solo: Full Party
In-game time: ?
Area and coordinates: Syrcus Tower, Alexander, any World S-rank
Housing: n/a
Steps:
1. Join any Alliance or Normal raid, or a popular hunt
2. Use any ability/spell (in my case, Jin/Chi/Ten/Raiton/etc)
3. Use the action on a monster/boss
4. Wait for the sound effect
5. Hear the sound effect 2 seconds later
-or-
5. Don't hear the sound effect at all
6. Once the fight is complete, the delay ceases
7. Monster actions and other effects are also delayed, but not as obvious
8. Has only started happening since Patch 4.3

Connection Specs
- Type of internet connection/provider: 60Mbps Cable / Start.ca
- Modem maker/model number: Thompson DCM476

■ PC Specs

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

SYSTEM_OS Windows 10 Pro 64-bit (6.2, Build 9200) (16299.rs3_release_svc_escrow.180502-1908)
SYSTEM_CPU Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz (12 CPUs), ~3.7GHz
SYSTEM_CORE_NUM SYSTEM_CORE_LOGIC 12 SYSTEM_CORE_PHYSICS 6
SYSTEM_BIOS Default System BIOS
SYSTEM_LANGUAGE English (Regional Setting: English)
SYSTEM_MEMORY 16338.918MB
SYSTEM_VIRTUAL_MEMORY 134217727.875MB
SYSTEM_PAGE_FILE 18770.918MB
SYSTEM_STORAGE C:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 222.787GB SYSTEM_FREEDISC_SPACE 44.145GB
SYSTEM_STORAGE E:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 1863.015GB SYSTEM_FREEDISC_SPACE 637.593GB
SYSTEM_STORAGE G:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 1863.015GB SYSTEM_FREEDISC_SPACE 147.365GB
SYSTEM_STORAGE P:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 489.047GB SYSTEM_FREEDISC_SPACE 89.283GB
SYSTEM_DIRECTX_VERSION DirectX 12
SYSTEM_GRAPHICS NVIDIA GeForce GTX 1080 Ti
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY1
SYSTEM_GRAPHICS_CHIP GeForce GTX 1080 Ti
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 11127.000 MB
SYSTEM_GRAPHICS_SHARED_VRAM 8169.459 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 3840 x 2160 (32 bit) (60Hz)
SYSTEM_GRAPHICS_DRIVER C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_38c9bee769f9ef1f\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_38c9bee769f9ef1f\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_38c9bee769f9ef1f\nvldumdx.dll,C:\WINDOWS\System32\DriverStore\FileRepository\nv_dispi.inf_amd64_38c9bee769f9ef1f\nvldumdx.dll
SYSTEM_GRAPHICS_DRIVER_VERSION 24.21.0013.9764
SYSTEM_GRAPHICS_DRIVER_DATE 5/6/2018 20:00:00
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_SOUND Focusrite USB (Focusrite USB Audio)
SYSTEM_SOUND_DEVICE_ID {7B011677-500A-424A-AF21-9FDB01B81678}
SYSTEM_SOUND_DEVICE_NAME FocusriteUSBAudio.sys
SYSTEM_SOUND_DRIVER_VERSION 4.36.0005.0612
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 1/9/2018 00:00:00
SYSTEM_SOUND Digital Audio (S/PDIF) (3- High Definition Audio Device)
SYSTEM_SOUND_DEVICE_ID {55C11E19-5BC8-4F95-BC68-DF144CFDF02F}
SYSTEM_SOUND_DEVICE_NAME HdAudio.sys
SYSTEM_SOUND_DRIVER_VERSION 6.02.16299.0251
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 2/21/2018 00:00:00
SYSTEM_SOUND U28E590 (4- High Definition Audio Device)
SYSTEM_SOUND_DEVICE_ID {A7138946-9704-48E2-955A-FAC1FB2AB328}
SYSTEM_SOUND_DEVICE_NAME HdAudio.sys
SYSTEM_SOUND_DRIVER_VERSION 6.02.16299.0251
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 2/21/2018 00:00:00
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 {8A0C19A0-3DC4-11E3-8001444553540000}
SYSTEM_INPUT_NAME G9x Laser Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 652 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {8A0C40B0-3DC4-11E3-8003444553540000}
SYSTEM_INPUT_NAME G9x Laser Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {8A0C67C0-3DC4-11E3-8005444553540000}
SYSTEM_INPUT_NAME G9x Laser Mouse
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {AA207D40-4A4D-11E3-8001444553540000}
SYSTEM_INPUT_NAME USB Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 653 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {AA20A450-4A4D-11E3-8002444553540000}
SYSTEM_INPUT_NAME USB Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 3 SYSTEM_GAMEPAD_FOV 0


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


Browser Information
- Name and version of the browser currently in-use: Google Chrome (latest)
- Internet Explorer Version: Edge (latest)


Thank you for your consideration.