Found a bug in version 0.362 in the Overgrown Fertility temple. (Fresh save)
In a fight with the plant girls if they use their skill Magical Seed Growth and max out your meter while in battle it will not complete the transport to outside the dungeon to expel the seeds. You say stuck on a black screen with the characters battle portraits the only thing visible.
The character each get their dialog then the black screen happens
Images below
