Fell under the map and stuck there

Bug Name:

Fell under the map and stuck there​

Bug Description:

Quest Name: Murrowak's Labirynth
Step that is bugged: Final step
What is bugged with that step: When the game teleported me outside the cave, after the loading screen disappeared, I was falling under the map, stopped at some point and was swimming in the air until I noticed that I had a usable map to teleport.
How to reproduce the issue: I wish I knew​

How to reproduce/proof:

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