Quest 2 right controller flying away when moved away from device

Every time the right controller is moved away from the vr or rotated, it disconnects or flies away.

I've tried changing the batteries, re-pairing it and disabling hand tracking, to no avail?

Is this likely to be a hardware issue? My son has used it so I can't sar for sure that it's not been banged, but the left one works perfectly fine.