4.3.0 beta - no sound in random cases when hitting hot cue button

hello, 

I just tested the new beta. in some cases, there is no sound playing when i hit a hot cue button. i hit them a couple of time after another (about 1-2 seconds interval). In some cases I can see the wave form move, but I hear no sound. Most of the time it works. The output is headphone connected to DDJ-RR. When I use a different output, it works fine.