Also problems with AA not connecting reliably to Car Link on DUDU7 running ver.3.5 software. Connecting first time only about 50%... Have to try reconnecting. Sometimes it connects immediately, sometimes needs 2-3 attempts. This is the case for both wireless and USB connections.
Phone is a Samsung A55 which connects 100% reliably (wireless) to Merkede M300S (7862), Eonon UA13, Pioneer etc - so I think the problem is the DUDU7 HU....