Nextcloud Office current users editing document bug

Nextcloud Office: 5.0.3
Collabora Onilne: Built-in CODE Server: 21.11.204
Nextcloud: 23.0.3

When I open a document for writing, then close it and come back to it later, I’m greeted by this (see image): Imgur: The magic of the Internet

As you can see, even though I only have 1 instance of the editor open, NC Office seems to think I’m editing the document from a ton of tabs that have since been closed.

Anyone got an idea about this?