Tab groups keep disappearing

Steps to reproduce:
Not sure what is happening. However, on multiple occasions recently, when I return to my computer and go to the Tab groups, all of my tab groups are gone. This is really frustrating. I tried using a backup of the favorites, but tab groups do not seem to be stored there. Where are tab groups prefs stored? That would be helpful.

I think it generally happens after I restart the computer.

Expected behavior:
Persistent tab groups.

Orion, OS version; hardware type:
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Vlad I have not really paid much attention to it until the last couple of times. Figured it was an anomaly. However, it seems to happen after an update to Orion. Not sure. I will pay more attention and report back if/when it happens again.