Sequence play ensureMsgf call

So there is a problem. I made a simple trigger box that start a sequence to play. But some time in VS studio i got warning brake point with following message:
“Cannot flush this runner while it is already being flushed outside of a re-entrancy window”

I was unable to find any information about it. Maybe this issue is a source of another problem with sequence. During playback character become “twitchy”, like he’s trying to rotate. However if launch sequence from button (press E, for instance), it works perfect. Any ideas of solution?