VOIP is not receiving calls

Hello,

I am developing a calling service using CallKit and VOIP push.

I have occasionally encountered a strange issue.

The issue is that VOIP permanently fails to receive calls.

I was previously informed that even if the device is blocked, it can receive calls again after 24 hours.

Also, when I checked the device logic, it complied with the policy requirements set by Apple, including correctly calling CallKit's reportNewIncomingCall method.

Once the issue occurs, no matter how many times I try, VOIP does not receive calls, and neither a device reboot nor checking the Device Console Log shows any logs related to CallKit or VOIP.

I suspect this might be an issue with the VOIP token, and I believe that the only way to get a new one is to reinstall the app. Is that correct?

Of course, after reinstalling, it works fine again, but this is very inconvenient. I don't think this is the right solution.

Is there anyone who can share their insights on this issue?

Thank you.