Latest VEP7, intel i9 Mac latest
1) Launch VEP7 and create a new instance
2) Add channels for any two 3rd party AU plugins (VST plugins and Synchron Player do NOT suffer from this bug): could be Kontakt AU, SINE player AU, Spitfire Originals AU... your pick
3) The bottom channel should be selected, just press the left arrow key which should select the next higher channel...but.....
=> Immediate crash out of VEP7, Mac desktop is all you see
I thought I saw a bug fix announced of something like this at some point recently, but if so, it has regressed.
(Also, I posted a lot of feedback (much of it positive) in this forum on Synchron Prime Edition and it all got deleted. Fear not criticism. The "Johann Strauss rather than Richard Strauss" line I'm not letting go of, that was bullseye. But I do like your stuff anyway.)