If you attempt to use the shortcut Ctrl + BACKSPACE in the rename mock up dialog it does not work. It will delete the word and insert a symbol, then prevent anymore Ctrl + BACKSPACE commands.
Good to hear from you again!
Thanks for the report, I’ve added this as a feature request in our tracker so we can review and consider it for the future. If others would like to see this feature, please let us know (or add your Like/Heart vote above) to help us prioritize this request.