Cubase 15 erased all track names and arranger names in a project from v14

Opened a project from v14 and played around extensively with it with no apparent problems. Upon opening the same project today again, all track names are gone from the editor and mixer/visibility tab and all names are missing from the arranger track too.

It’s a big project, almost 2 hours with a lot of data.

Any thoughts on how to recover this? Opening with v14 shows exactly the same problem - all track names gone….

Edit: I had to go into the AutoSave folder and recover from one of the backup files…thank the lord for Autosave. I’m missing a few non critical edits since that save, but at least I got all the naming back across the arranger and editor/mixer.

I guess this is one to watch out for. I had a few .bak files that still had the problem…which is really weird because the problem just wasn’t there last night when I last had the project opened last. That’s a worry TBH, because if you can’t see the problem AFTER you’ve saved, and it only shows up when you restart C15 and reload the project…that’s really the worst of all possible bugs.