I was using A.tape command, but can try with other commands later to see if its the same
i tried again, with the iphone connected to the AaL port and the BV6 via ML. Same result as 1) above whether choosing CD, A.tape and Radio (my BC6 is w/o built in radio).
also have a Beocord 3500 i tried connecting, same result. Discovered afterwards that it only has a 5 pin din plug, so will try to fit a 7pin and try again