I’m unable to reproduce this issue on my install.
Are you able to enable error logging in the Main Config by setting it to:
ALL & ~E_NOTICE
Then try to reproduce the issue and check your web server error logs. They may be located in your hosting control panel or in the folder on your server such as error_log or /admin/error_log
Then any errors that come up after please send them to me and I can try to see what the issue is.