Based on the symptoms described, the issue seems to be related to corrupt system files.

I suggest running a system diagnostic and repairing any corrupted files that might be causing the problem. To run a system diagnostic, please use the following command:

sudo fsck -f /dev/sda1

Replace sda1 with the actual partition where your Ubuntu 22 is installed. This command will scan the file system for errors and attempt to fix them.

If the issue persists after running a system diagnostic, try reinstalling the terminal emulator or switching to a different one to see if that resolves the problem.

If the issue persists after performing the above, check if there are any conflicts with the system's graphics drivers that may be causing the terminal emulator to display incorrectly.

To do this, try running the terminal emulator with the ' -T xterm-256color' option to force it to use a different type of terminal.

If this resolves the issue, then you may need to update or reinstall your graphics drivers. If the issue persists, please contact technical support for further assistance.
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