nidza

https://www.volkswagen-newsroom.com/en/electronic-differential-lock-xds-3943

This thread is too long, as described behavior looks as 1 to 1 for strong FWD car with an e-LSD assistance (XDS+ trademark in VAG) when momentum transfer balance between front axles is severely disturbed, what exactly occurs when one of the wheels loses traction on bump. I can provocate it in my car all the time, even it has VAQ in the front - because on high accelerations on low speeds, momentum difference between front half-axles can go above what VAQ can transfer. XDS+ in this case applies braking force to the slipping wheel with short braking bursts. edit: don't waste your life going to the dealers, all what's happening is perfectly normal.

I can propose you a workaround until you resolve the issue, or change your phone - maybe there is some compatibility issue, try battery saving mode in the phone while connected.

Almost certainly wheel bearing. What may be tricky is that direction from which noise and vibrations are coming, if it's a bearing, can be deceiving.