Ever ran a command that left your terminal mangled after it finished? No output, weird chars, etc.
That's lack of proper tty hygiene on the offending command. Instead of killing your terminal, type:
stty sane
Programs that draw a progressbar often hide the cursor so there won't be a blinking cursor "glitching" the visuals. Once you see it, you'll start noticing programs that hide the cursor.
If it happens only on wezterm, it is probably some kind of bug on their part (no support for the escape code that re-enables the cursor maybe?). Have you tried other terminals?