Random attack env clicks

EDIT: there are clicks with or without the sustain pedal. So puzzling!

I’ve noticed this behavior for awhile and with a current project it’s really noticeable. I have a standard piano ostinato-type track with sustain pedals up/down. 2 OSCs. Problem is, it’s inconsistent—sometimes I can play several measures with no clicks; play it again and the clicks start up.

Things I’ve tried that have not fixed it:

  • Reduced main patch volume (in case of sustain buildup)
  • Increased voice number
  • Increased attack time to 0.5 seconds (env 1 & 2)
  • Disabled glide, disabled legato, disabled slope
  • Disabled env > OSC levels

I’m really hoping to find a solution to this because Vital, as it happens, also does amazing keys.

Vital 1.5.5
Logic 10.5.1
OS X 13.6.9