PTT button on headset does not accept incoming calls

[mvglasow]

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

To reproduce:

1. Use Signal for Android on a device with a Bluetooth headset.
2. Call the device.
3. When the device rings, press the PTT key on the handset.

Expected behavior:

Pressing PTT causes Sigal to accept the incoming call.

Actual behavior:

The ringtone goes silent briefly, then continues ringing. I have to accept the call by using the touchscreen.

Additional information:

At the time the call came in, I was listening to music using VLC for Android, which supports PTT for play/pause. VLC paused the music as the call came in.

Screenshots

No response

Device

Fairphone FP4

Android version

Android 13 (LineageOS 20-20230129-NIGHTLY-FP4)

Signal version

7.28.4

Link to debug log

No response