BUG, midi tracks switch their host VST to another

For example: I have an instance of kontakt instrument with 15 midi tracks (with kontakt being the host and midi 1). After I save and reboot the project, the midi tracks are assigned to another kontakt instrument within the session. Now I have to go to mixconsole and Q-Link reroute them back.

Does anyone have an idea how to fix this? Is it common?