Caller can't hear me after using headset

• /e/ version: 0.9-2020062560240
• Device model: Fairphone 2
• When it started to occur: a couple of weeks ago
• Reproducible with the last /e/ version:
• Reproducible with LineageOS:

Summary

When calling the caller can't hear me. The problem seem to occur when I have used headphones in the last call. After reebot the caller can hear me again. The microphone is working (checked with the FP Checkup-App). The problem only occurs when taking phone calls, in messengers such as Threema, Signal and Telegram the problem did not occur so far.

• The device is unusable
• The bug is the source of a data loss or a big waste of time
• The bug concerns a third-party application
• The bug concerns security
• The bug concerns privacy

The problem

Steps to reproduce

Use a headphone (with cable) for a call. End call. Disconect headphone. Call again.

What is the current behavior?

Caller can't hear me.

What is the expected correct behavior?

The caller should hear me.

Technical informations

Relevant logs (adb logcat)

Relevant screenshots

Solutions

Workaround

Reboot after taking a phone call using headphones.

Possible fixes