Same problem here.
macOS Catalina, iMac19.1, Radeon 580X 8GB, 64GB RAM
I found a solution that helped me:
- Change texture quality from High to Low
- Open/close inventory 4-5 times quickly (press B)
- Change texture quality from Low to High again
- Open/close inventory 4-5 times again
After that I don’t have issues anymore, although only until next reentering to the game. Then I have to repeat aforementioned process again.