Quick update:
Today, the audio quality of my AirPods Pro degraded to the point I couldn't use them.
I plugged them in for a few hours and reset but "Forgetting" the device and holding the pairing button down for 15 minutes.
Once connected I checked the firmware version, their's been news they released a new update.
My AirPods Pro now report: 2D15
The audio is slightly improved in the left bud, the right one has been fine.
There is a low level squeak from the left bud during music playback and similar squeaking with ear canal vibration/movement.
Only in the left ear, can't reproduce it in the right.
https://www.macrumors.com/2020/05/05/apple-updates-airpods-pro-firmware-to-version-2d15/