"Griffin, Griffin on the Wall" does not advance on completion of Baelsar's Wall

I have completed the instance Baelsar's Wall three seperate times via the duty finder both solo and in a group and the MSQ refuses to progress on "Griffin, Griffin On the Wall". The first time I completed Baelsar's Wall the game disconnected me from server, on subsequent completions the game spits me out back where I entered the duty with no cutscenes, nothing. The MSQ is effectively broken for me and I cannot progress.

Time: 6pm 10pm and 11pm on 6/17/2017 EDT ; 12:40pm EDT 6/18/2017
Frequency: Every time I exit Baelsar's Wall
World name: Excalibur
Character name: Max Blasto
Retainer name: N/A
NPC name: N/A
Monster name: N/A
Class/Level: Warrior/61
Party or solo: Both
In-game time: N/A
Area and coordinates: Baelsar's Wall, the exit
Housing: N/A
Steps:
1. Queue Baelsar's Wall
2. Enter Duty
3. Complete Dungeon
4. Click the exit
5. Exit the instance
6. Server terminates the connection while exiting, sent back to main menu
7. Log in back where accepted duty
8. Quest still not progressed
9. Reclear a new Baelsar's Wall
10. Exit instance, NO SERVER DISCONNECT
11. MSQ requirements not met, quest is not advanced.

Connection Specs
- Type of internet connection/provider: Cable/Cox
- Modem maker/model number: NETGEAR Nighthawk X6 AC3200

■ PC Specs

-=-=-=-=- System Information -=-=-=-=-
SYSTEM_OS Windows 7 Ultimate 64-bit (6.1, Build 7601) Service Pack 1 (7601.win7sp1_ldr.170512-0600)
SYSTEM_CPU Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz (4 CPUs), ~3.4GHz
SYSTEM_CORE_NUM SYSTEM_CORE_LOGIC 4 SYSTEM_CORE_PHYSICS 4
SYSTEM_BIOS BIOS Date: 10/31/12 21:41:41 Ver: 04.06.05
SYSTEM_LANGUAGE English (Regional Setting: English)
SYSTEM_MEMORY 8077.492MB
SYSTEM_VIRTUAL_MEMORY 8388607.875MB
SYSTEM_PAGE_FILE 16153.168MB
SYSTEM_STORAGE C:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 232.884GB SYSTEM_FREEDISC_SPACE 86.651GB
SYSTEM_STORAGE D:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 0.098GB SYSTEM_FREEDISC_SPACE 0.070GB
SYSTEM_STORAGE G:\ SYSTEM_HARDDISK_DRIVE SYSTEM_TOTALDISC_SPACE 931.412GB SYSTEM_FREEDISC_SPACE 284.659GB
SYSTEM_DIRECTX_VERSION DirectX 11
SYSTEM_GRAPHICS NVIDIA GeForce GTX 970
SYSTEM_GRAPHICS_DEVICE \\.\DISPLAY1
SYSTEM_GRAPHICS_CHIP GeForce GTX 970
SYSTEM_GRAPHICS_MAKER NVIDIA
SYSTEM_GRAPHICS_VRAM 4008.250 MB
SYSTEM_GRAPHICS_SHARED_VRAM 3782.746 MB
SYSTEM_GRAPHICS_DAC Integrated RAMDAC
SYSTEM_GRAPHICS_DISPLAY_MODE 1920 x 1080 (32 bit) (60Hz)
SYSTEM_GRAPHICS_DRIVER nvd3dumx.dll,nvwgf2umx.dll,nvwgf2umx.dll,nvd3dum,nvwgf2um,nvwgf2um
SYSTEM_GRAPHICS_DRIVER_VERSION 22.21.0013.8205
SYSTEM_GRAPHICS_DRIVER_DATE 5/1/2017 6:32:51 PM
SYSTEM_GRAPHICS_DRIVER_LANGUAGE English
3.0
SYSTEM_GRAPHICS_PIXEL_SHADER 3.0
SYSTEM_GRAPHICS_VERTEX_TEXTURE SYSTEM_SUPPORT
SYSTEM_SOUND Speakers (Sound Blaster Audigy Fx)
SYSTEM_SOUND_DEVICE_ID {1A1296B7-DD31-45F2-905C-D2CE09220572}
SYSTEM_SOUND_DEVICE_NAME HdAudio.sys
SYSTEM_SOUND_DRIVER_VERSION 6.01.7601.17514
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 11/20/2010 11:23:47 PM
SYSTEM_SOUND Digital Audio (S/PDIF) (High Definition Audio Device)
SYSTEM_SOUND_DEVICE_ID {67C6C53E-7133-4665-AF8A-06AF1F57322F}
SYSTEM_SOUND_DEVICE_NAME HdAudio.sys
SYSTEM_SOUND_DRIVER_VERSION 6.01.7601.17514
SYSTEM_SOUND_DRIVER_LANGUAGE English
SYSTEM_SOUND_DRIVER_DATE 11/20/2010 11:23:47 PM
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 {896CF780-F9DC-11E6-8001444553540000}
SYSTEM_INPUT_NAME XBOX 360 For Windows (Controller)
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 5 SYSTEM_GAMEPAD_BUTTON 10 SYSTEM_GAMEPAD_FOV 1
SYSTEM_INPUT {939FCD20-6B09-11E6-8001444553540000}
SYSTEM_INPUT_NAME Gaming Mouse G600
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 0 SYSTEM_GAMEPAD_FOV 0
SYSTEM_INPUT {939FCD20-6B09-11E6-8002444553540000}
SYSTEM_INPUT_NAME Corsair K70R Gaming Keyboard
SYSTEM_INPUT_REMARKS SYSTEM_GAMEPAD_AXIS 0 SYSTEM_GAMEPAD_BUTTON 4096 SYSTEM_GAMEPAD_FOV 0


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Browser Information
- Name and version of the browser currently in-use: Chrome Version 58.0.3029.110 (64-bit)

http://i.imgur.com/LAKbBVX.jpg here is a screenshot of the quest in my quest log, it acknowledges I 'overpowered griffin' and need to see events to completion.