[PinePhone/Plasma Mobile] Phone call audio not properly routed

Describe your issue

What's the expected behaviour?

When receiving and/or making a phone call in the stock Plasma Mobile dialer, I would expect the audio routing to automatically switch over to the "Make a phone call" profile, and preferably switch back automatically to "Play HiFi quality music" after ending the phone call.

What's the current behaviour?

Current behaviour is that it stays on the latest set audio profile, which is "Play HiFi quality music" from a fresh install.
This makes the phone ring properly, but when answering the call, no audio is processed so you can't hear the other end, and the other end doesn't hear you as well.
Manually switching over to the "Making a Phone Call" audio profile makes the audio routing properly set up and you can continue making the phone call as normally.
After ending the call the profile stays on "Making a Phone Call" profile, which makes the audio routing set-up properly for any following phone call you place, but doesn't make the phone ring properly when receiving a call.
The ringtone will be played through "Internal Earpiece" when set-up like this, which you will need to set to a very high volume level not to miss it.
The same goes for placing a call yourself.
The audio will not be properly set-up for phone calls when placing a call, so you won't hear the ringer and no voice/speech when the other end picks up, until you manually switch over to the "Making a phone call" profile.

How to reproduce your issue?

Just place/receive a phone call on your PinePhone using just a clean flashed Plasma Mobile image.

What device are you using?

pine64-pinephone

On what postmarketOS version did you encounter the issue?

• edge (master branch)

• v22.06

• v21.12 (supported until 2022-07-12)

• I confirm that the issue still is present after running sudo apk upgrade -a

On what environment did you encounter the issue?

Phone environments

• Phosh
• Plasma Mobile
• Sxmo (Wayland/Sway)

How did you get postmarketOS image?

• from https://images.postmarketos.org
• I built it using pmbootstrap
• It was preinstalled on my device

What's the build date of the image? (in yyyy-mm-dd format)

The image where I encountered this issue was: 20220622-1627-postmarketOS-v22.06-plasma-mobile-3.8-pine64-pinephone.img.xz

Additional information

When I need to test anything for you, or try to obtain some logs, just let me know. I might need some guidance though as I'm used to Manjaro ARM. This is where audio routing is properly working, so I know it's not a Plasma Mobile issue.