I’m on Gnome 46 and the on screen keyboard at 400% on a 4K monitor pops up a very large grey area, but the keys themselves are aligned along the very bottom of the screen instead of (what seems logical) in the vertical center of that area.
Also, clicking twice on the backspace key closes the terminal app… so, people who have to use on screen keyboard aren’t allowed to make spelling mistakes, it seems.
On Fedora you can run coredumpctl list to check if a previous crash has been recorded and then launch gdb for that previous crash coredumpctl gdb PID_OF_THE_CRASH. Then you can run bt full to get a backtrace.