I currently only have two "Teletone Audio" plug-ins in my Kontakt player (Tympo and Retrograde Bass)
When I drop Kontakt into a new project/channel rack it opens it up fine (and works fine when loading these plug ins)
If I try to open the file again it crashes. It usually takes two or three times for FL studio to open the file properly again so I assume it has something to do with Tympo or Retrograde because I have no issues with other FL files that don't have Kontakt in the channel rack.
HOWEVER, if I've been working on a project that has a few elements already in the rack and then later decide to drop a Kontakt, it usually crashes.
It's weird because i'm not entirely sure if it's a Teletone plug in problem or a Kontakt problem. It always crashes at the same moment: