if sound is configured with 'internal speaker', after a missed call, it changes to 'internal earpiece'

In mobian pinephone:

How to reproduce:

1. I move up and down the volume keys in pinephone, I see it is changing the "internal speaker" volume

2. I receive a missed call

3. I move up and down the volume keys in pinephone again, and I see it is changing the "internal earpiece" volume (the expected is "internal speaker")

(gnome-calls 42.0)