I realize this is a zombie thread by now, but-
I think this is an issue L6 should address (still a bug in firmware 1.10) to have the looper exit dub mode but continue playing when you send any value for CC 60.
Meantime I've come up with a workaround of sorts. I build/program my own MIDI controllers, but it should work as long as your device can send multiple CCs per button press.
I'm sending a stop message immediately followed by a play message CC61 0/127, which happens so quickly it effectively does what we'd expect - exit dub mode and continue playing.
i still need to test a little to make sure everything stays in sync i.e. no glitch with the stop/play thing, but so far so good.
EDIT: the issue now is, the stop/start combo resets to the beginning of the loop, so will glitch unless you hit it at the ight time. SIgh.