Strange Behaviour With "/" Completion in Lists

The new Slash-Command-Completion popup seems to mess up CKEditor's internal state in lists - see the attached screencast.

1. I had the symbol in the list and wanted to change it into a checkmark .
2. I replaced the x with an /.
3. To get rid of the popup, I pressed the letter s behind the closing bracket.
4. Then I only pressed "backspace" to remove the s again and - whoops?!?
5. Then I selected the "junk" and pressed the "del" key to get rid of it - whoops again?

This is reproducible.

• Xwiki LTS 15.10.7
• Browser Chromium Version 122.0.6261.94 (Offizieller Build) snap (64-Bit)
• Ubuntu 22.04 (KDE neon actually)