I made a little looper in max4live that works fine as long as I don't use a midi controller or keystroke within Ableton itself to control it. I really don't get it.
If I click on the looper's record button with my mouse everything works fine. If I assign a midi controller (korg nano kontrol or behringer fcb1010) to the same button, the button lights up and the looper starts recording. If I view the buffer I can also see that it is recording. But: If I hit the button again to end recording, it erases the buffer!
If I use the controller to start recording and click with the mouse to stop it also works fine.
If I just assign a keystroke in Ableton to the button I have exactly the same problem.