Ancient Goblin Secrets - Speak With Notched Bone

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Date & Time: 4/16/2021
Frequency: 3(would be indefinite but I gave up)
World name: Gilgamesh
Character name:
Retainer name:
NPC name: Notched Bone
Monster name:
Class/Level: AST 65
Party or solo: solo
In-game time: 12PMish?
Area and coordinates: Dravanian Hinterlands X: 10.4 Y: 29.9 Z: 1.0
Housing:
Steps:
1. Speak with Notched Bone
2. Cutscene loads
3. As Notched Bone and Dedean walk up, cutscene freezes with no further dialogue. Skipping cutscene brings to endless loading screen.
4. Upon hard quitting the game, reloading, quest is returned to same point. Can successfully skip cutscene before Notched Bone and Dedean walk up.
*Add more steps if necessary

I just had the exact same problem, and even having the dialog go automatically didn't fix it, I had to use the same solution as what you found.

I am experiencing the same problem. Cutscene starts but the dialog doesn't come up. I am playing on the "beta" PS5 version if that makes a difference. I did not try the PS4 version yet.