Import Tracks From Project - Deletes all Events and audio data routed to random group tracks

I’m using cubase pro 12.0.30 on a windows 10 PC with an amd ryzen 9 cpu.

When importing tracks (specifically the inspector settings and NOT the audio/event information), Cubase will randomly delete the audio/events from my session. The audio/events that are deleted are usually all the files that are under one of my group busses.

To fix this, I have to re-import the tracks from the other project again, but change it from import inspector settings to just events/audio. Then the audio is re-imported back into the project.

This doesn’t happen all the time, just for certain songs. Is this a known issue? Thanks so much!