All calls forwarded after applying OTA-9

[PhAndersson]

Hello,
This is not a request for help, just sharing my experience with the community.
After applying OTA-9 on the phone (Pixel 3A), I noticed twice that it wouldn't ring at all any more when someone called me. In each case, the caller was immediately redirected to voicemail.
I accessed the call forwarding settings on the phone (System Settings | Phone | Call forwarding). I didn't need to change anything. But retesting after doing this, everything worked fine -- the phone would ring again when called.
HTH
Ph. A.

[OtaDr]

@PhAndersson Hello,
it happens to me now, and it also happened with previous OTAs,
that the phone uses only the earpiece instead of the speaker for ringing, so the ringtone is silent.
It was not possible to set it up, but restarting the device helps.
I have a feeling that this happens after connecting the speaker via Bluetooth (hands-free in the car).

[PhAndersson]

@OtaDr I'm not sure my experience is similar. My phone connects to a Bluetooth headset every day (Skoda car kit or Sena headset in my motorbike helmet), and I never noticed any issue with this.

Also, based on the test I made at the time, it's not that the ringing is silent -- the phone doesn't ring at all and the caller is immediately redirected to my voicemail.

Furthermore, I noticed something else during my holidays in France. In this case, my phone was roaming on a foreign provider's network (SFR), and the problem manifested itself again. I had to use the same technique to get the phone to ring again. So I have the feeling there may be an issue in the way the phone negotiates the initial connection with each new provider it uses.