Answering "incoming audio calls" via Callkit always fails.

[YamatoRyou]

Steps to reproduce

0. Update to 26.4.0;
1. Use other apps to initiate calls;
2. Put the target device into lock screen state and turn off the screen;
3. Wait for Callkit to display. Once displayed, start answering immediately.

Outcome

What did you expect?

n/a

What happened instead?

When trying to answer the call, the device immediately displayed "Call Ended" (this prompt was given by Callkit), but from the perspective of the other party, it was not obvious that I had hung up. This means that the call was automatically and forcibly interrupted.
From now on, even if the other party calls again, the target device will no longer respond to incoming calls. Unless temporarily restored by the following operations:

1. Unlock the device so that it displays Springboard;
2. Let the other party initiate the call again, so that the target device displays the incoming call banner;
3. Reject this call;
4. Put the target device back into lock screen state and turn off the screen.

But in short, Callkit can only be displayed once before repeating the above operation.
Rejecting a call by pressing the power button twice quickly will also cause Callkit to disappear.

This problem renders it practically unusable:
#5298

Your phone model

iPhone SE 3

Operating system version

iOS 18.7.1

Application version

Element X iOS 26.4.0

Homeserver

Synapse 1.150.0

Will you send logs?

Yes