Wayland uses only default fonts?

Hi, today I first time successfully launched Wayland with Nvidia and find it doesn’t use my defined font (Ubuntu). After I tried to apply Ubuntu Medium, I got a BSOD. How could I fix it?

Increasing all fonts by 1 (from default 10 to 11 e.g.) and ctrl+alt+backspace, it looks like Ubuntu font was applied and looks exactly like of default size at least in Plasma (not in a browser).