FP3+ Blutooth doen't function - after connecting it's disconnecting and connecting and disconnecting

Using /e/OS Troubleshooting
1

Actually I use 0.16 on FP3+
on 0.15 i had the same issue with some devices (different bluetooth speakers of JBL for example)
but connecting with FP2 and Linux PC was functioning. I was able to change files.

Now stable connection is no more possible with any device I have. It connects and disconnects and again and again within seconds.
I tried with safe mode - there was no difference.

How can I fix this?
Thanks for help

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2

What exactly do you get in Settings - About phone - Android version - /e/ version?

I didn’t use Bluetooth for a while, but I could have a look with 0.16-q-20210424112062-dev-FP3.

3

Yes, thats my version as well. Thank you!

4

I get stable pairings with a Panasonic RF-D20BT radio and a Marantz NR1508 receiver for audio, and my Fairphone 2 for files. No problem.

5

Ok, may be, the bluetooth app is damaged. Can I reinstall it somehow to fix it? Or what else can I do?