Mpc One random volume level at start sequence

Mpc One with last firmware 2.12.1
I have strange issue: when i press play/start button and start a sequence, sometimes I hear the first snare hitting quieter(maybe distorted but still quieter) than usual(normal volume of sample). Absolutely random thing, but only happening in the first bar. Im tryin to delete all automations and all fx but it doesn't depend on them. I have no idea what could be the reason, but it's annoying. I have to make a trackout 2 times longer to avoid accidental failure at the beginning of the sequence…
Who have same issue?

Lampdog wrote:Did you check to see what is happening with that event in LIST EDIT?

There are no changes in the LIST EDIT, everything is in order.
But I eventually found the source of the problem. This is a double click of the STOP button.
Further, after pressing the PLAY/START or PLAY button, the first beats of each sound come with distortion and a decrease in volume. But only the very first, then everything is fine.
If you just press STOP once, then there is no such problem.
But the most unpleasant thing happens when bouncing. The bug happens regardless of the number of stops pressed, etc. The first beats of the sequence are always exported with distortion.
I hope that this (software?) bug will be fixed in the next updates.