During the final fight with Molag Bal, after Molag picks up the player and the player weakens him, the player is dropped but instead of the fight starting the player dies from fall damage and Molag never spawns.
Thus far I have tried both resetting Molag, as well as completely leaving the area and taking the portal (from the Harbourage) back into the instance, and the bug still persists.
Here is a video for reference:
https://youtu.be/IdW46tk1bVk
(MC) Main DPS: Redz Kuinn - Lvl 50 - MagSorc - PvE
Main Healer: Soranna Anilu - Lvl 50 - Templar - PvE
Main Tank: Seamus Kuinn - Lvl 50 - Dragonknight - PvE