So I found the culprit.. The Logitech X56 throttle is SUCH a piece of garbage that it was creating it's own inputs (and somehow it made it's own keybinding for AP to be on)....The X56 throttle is now where it properly belongs..IN THE GARBAGE lol
Sometimes we see this on Mac. In the file /Users/olda/Applications/X-Plane 12/Aircraft/X-Aviation/TorqueSim BN-2T Islanders/TorqueSim BN-2T Turbine Islander/plugins/is_systems//settings/settings.cfg, change the line `disable_mtuploader` to a value of 1.
The random failures that would affect the custom systems would not connect over to the retail SR. XP failures that trigger environmental issues (eg. failing an ILS, etc.) or default aerodynamic subsystems (eg. aileron hard-over) would still work.