Yup, haven't been able to get around it.
EDIT: I can still move around in there and interact, but cant see anything.
EDIT2: Found my way into the dungeon, it borked too. 
Here are my PC stats:
Windows 10.
CPU: AMD Ryzen 9 3900X 12-Core Processor
GPU: NVIDIA GeForce RTX 2070 SUPER
RAM: 16GB.