Source data filters suddenly show up blank in the web UI

Firefox 123 is out with broken site reporting tool makes me wonder if I can report 123 fails here?
I’m not sure it’s a new feature. How do I report a broken site in Firefox desktop? has further info.

EDIT 1:

Got another report back recently. Looking forward to your result.

EDIT 2:

Oops. I see that’s you in the other topic, so we’re not waiting for you here now…

Maybe I’ll see if any more luck happens in tracing down the JavaScript problem.