i recently bought a 2nd BCR unit. i connected it as explained in the BCR manual: main unit (the one connected to the USB port) on U-4 mode, and the second one on S-3.
in Live, i've set the midi controler option In and Out to ON in the preferences (the track parameter if set to OFF).
the problem i have is that as soon as there is some automation edited in the arrangement, the "back to arrangement" button switches ON on its own, even if it is not assigned to any button on my BCRs...
it's bloody annoying.
the only workaround i found was to disconnect the midi cable between the 2 units.
it's probably a driver issue with the BCRs, but i still wanted to report it here.
any help appreciated.