Random note fall out

I have all the latest X1 hotfixes up to 1b and the 4/19 quick fix.

Yet, the two biggest bugs I persistently run into with X1 are

1. Buggy snap to settings, which still come and go at times (sometimes they snap to the 1/16 segment, or 1/8 segment, sometimes they don’t, and i've played around with every preference snap to setting to no avail in terms of providing a steady fix), and now,

2.  I find that when I play a midi driven soft synth, X1 plays most, but sometimes eats (doesn't play) several the notes on playback.  It literally just doesn’t play them.  Then I’ll stop, play it again, and I will hear some of the skipped notes, but then some other notes are skipped. Very random.
It's not a "mute" issue.  I've been using Cakewalk/Sonar for years and know how mute works, and this has nothing to do with mute becuase again it is totally random.  I play the same track twice, I hear different notes silenced and different notes heard each time.
I checked "solo" vs "multi" sound settings in the synths, I checked portamento settings to make sure that isn't the issue, and then I thought this had to do with  X1 midi polyphony settings somewhere?  Because it happens across the board on all soft synths I’ve used like Rapture/TT 1, Session Drummer, etc.
It's not because I am overloading X1 on playback with too many tracks running midi, because it happens even if there are just two simple midi tracks with every other track frozen/archived..

The work around is I have been freezing the track which converts the sound it to audio,and this works.  None of the notes get eaten or silenced when I freeze the track.  But this is inefficient since every time I want to edit the piano roll I have to unfreeze and refreeze to hear the new edits…
 Any tips on why notes are randomly being eaten? 

LEHP!

thanks Bub.