I'm not sure how exactly to describe the problem but basically I have a two stage rocket, and after deploying the second stage to some specific altitude Vizzy is supposed to switch back to the first stage. However, when the staging command is given and the loading screen appears, nothing else happens. The loading screen just remains there forever and I have to force quit the game. This happened every time I tried to run the launch program, so it showed up repeatedly. Something I noticed along with that issue is that I am unable to manually switch to that stage in the map view because there is no option to do so. This is where it gets a bit speculative. I think I managed to fix the problem because I noticed that a fuel tank didn't have any connections to the stage it's supposed to be connected to. After adding a connection to said fuel tank the problem appears to have disappeared, at least I haven't encountered the problem again in the test runs after that.
