My brother and I are trying to meet online so he sends me a generated code of your game. Problem is you have only a very short time (like split second) to enter a letter - only if you click in the field and the vertical bar is popping up you can type. This makes it almost impossible to enter the code.
I selected existing world
Ultra Quality, no random world generated
It happens for me and him both.
We use both the same system:
Ryzen 9 5900x