Edit! It is an issue with Bazil vst3, see post at bottom.
Since the .30 update I had to disable reset on stop in the midi preferences. It leads to all kinds of issues, ranging from silent tracks (when locating with the mouse while in play) to sequences parts not starting on the first note but on the next midi note when using locators without stopping first. I have read about other problems too, when arming tracks, sustained notes stop, which I have too. Here simply disabling rest on stop fixed it (afaics after some testing/working).
Seems like reset is send on more occasions the stop with reset on stop enabled.
Hope Steiny can take a look at it!