Beta v13.09 - problem with BT connection

After updating the software to 13.09, my fenix 7 solar loses connection to the GC application. Iphone 12PRO for iOS 16.4(20E247).
I had a similar problem with beta 11.28, which was resolved by reinstalling the software. I performed the full procedure of removing the watch from the phone, installing the software and the watch reconnects, and then loses connection with the application. It is connected to the phone. So the error is on the line Watch -> GC application. Has anyone similar?
Or does anyone have instructions on how to get back to 11.28. It's starting to annoy me terribly that every update breaks the connection (yes, I know I'm in the beta program)

As you are running beta can i assume you posted this in the Beta Forum where it really belongs?  Instructions and limitations with reverting to the last released build are also included with the Beta details. Announcements - Fenix 7/Epix 2/Enduro 2/Quatix 7/Marq 2 - Garmin Forums 

No, I didn't post it in the beta forum. I'm doing it now. As for going back to 11.28, I already found the info (unfortunately, this requires a factory reset). Thanks

Having the exact same issue. For me the BT issues will appear as soon as I restart the watch. I have opened a bug ticket for this on 13.09 forum.

forums.garmin.com/.../bt-issues-on-13-09

You can fix the issue by factory resetting the watch as I described in my post. It is a pretty quick process since we have backups now with 13.09

we have backups now with

Do we have those already? I thought the part in the connect app is still missing? 

And does it really backup everything, most stressing   part would be setting up all IQ apps again. 

Jak mogę wykonać kopię zapasową na zegarku fenix 7 solar w dniu 13.09b?

Yes there was a Garmin Connect update introducing it silently I think. I wasn't able to find a way to manually trigger the backup, but I think It is making it every night automatically.

IQ apps are not backed up unfortunately. For me it wasn't issue since I only use 4. But other than that all settings are backed up I think. Even activity profiles and settings.

I was promped to restore my watch on the Garmin Connect app after resetting the Fenix and pairing it with the watch

everything is clear. If you reste your watch and pair, many data is back, for example: HRV status, ready for train, history activities,
I dont have a track route and maps(only from garmin). In acticty menu, everything is mixed - my settings is erased. In IQ connect i have history of all downloading apps. So, the most settings is back, and this is good. But in the POLAR watch, the backup is full with everything your stat, tracks and settings :)

And one more thing: the backup is in the system settings. Now we can start the backup manually :) That's good news. The connection returned, unfortunately, only after a hard reset to factory settings. And I lost the settings in the activity screens.