Airpods Pro 2 disconnecting from Apple Watch 7 Cellular when on call

[ReDy]

So I go out for a walk with the Airpods Pro 2 and Apple Watch 7 Cellular, but with iPhone left at home. I initiate a call and during this call I arrive back home. The Airpods Pro 2 in a few seconds disconnects from Apple Watch, or at least I think so, because the call switches to the Apple Watch’s speaker. I tried several times, and does the same, talked to Apple Support, they adviced me to send them to an Authorized Service Center, so I sent them to the closest one, and I got them back with no changes! They basically haven’t done anything in the service, they just told “Tested ok”