Found a bug in the Underdark where using vines to climb up results in the character falling seemingly in the chasm for a while until they appear dead on their respective bedroll at camp.

[Linked Image]

[Linked Image]

It is possible to workaround it by
walking around, jumping to a pillar, then jumping again (Gale is not athletic enough to make the first jump). This unlocks access to the spectator lair.