Two possible bugs...

MIDI THRU
Midi thru stays on when switching to another Softsynth track. When trying to switch midi thru off on the offending softsynth channel, midi thru would stay on constant (wouldn't switch off). Finally by selecting the on off for the grid view released it. Meaning, it allowed me to finally turn off the midi thru for that channel. In other words, no matter what track I was on, the track containing the stuck midi thru would sound also.
Could not recreate this thus far.

Plugin used was CRYSTAL

EQ CRASH
Had 38 tracks (76 stereo tracks total) running. Disk indicator at 64%, CPUs 1-2%. I opened the full view of the EQ on one channel, was moving the points on the grid...1 minute later total crash.

Was running the tracks from a USB Toshiba hard drive. Admittedly this was a test to see how many tracks I could run from my USB hard drive. So my result may not happen in a lower track count.