In a recent update, we added a feature that will constantly check if the Simconnect connection is not replying for more than 30 seconds and in this case, it will automatically restart the Couatl engine, which sometimes fixes issues of the program being stuck because of this.
This is clearly an abnormal situation because, normally, there is a constant connection between the sim and GSX at least every second, sometimes even more so, 30 seconds without receiving an answer seems to be an indication of a larger problem.
That's the only case I can see an automatic restart might happen.