Voice call lingers with no microphone

[ashemedai]

Guidelines

• I have searched searched open and closed issues for duplicates
• I am submitting a bug report for existing functionality that does not work as intended
• This isn't a feature request or a discussion topic

Bug description

I was on a voice call with another person using Signal on IOS. I had microphone and speaker on. In order to save battery and the screen, I turned off the screen using the power button (like you can with a normal Android voice call). Turning on the screen again showed that on the Android side the call had apparently ended. On the IOS side, the call was still there. Trying to call from Android to IOS Signal raised the call, but when picked up, there was no audio sent from Android to IOS Signal. Only after waiting for a little while was the microphone usable in the next call again.

Reproduce:

• Have voice call with IOS Signal user
• Press power button to turn off screen
• IOS Signal user still saw the call being active
• Turning on the Pixel screen showed no open call indicators anywhere
• Calling again worked, but microphone did not

Screenshots

No response

Device

Pixel 9 Pro

Android version

15

Signal version

7.25.2

Link to debug log

https://debuglogs.org/android/7.25.2/e33b41ec3956d7115d6e8670809478cc73394f6da54348a88df1d4c8ff5c8249