Maybe check that you don’t have any of your physical controls mapped to a cockpit switch/lever that might prevent/reverse the start-up procedure.
Controls like the mixture lever, battery and/or the magnetos might be getting inadvertently moved into a position where you don’t want them to be.
By the way, there is a thread or two on here about switches on the Honeycomb controllers, that might give unwanted commands. Honeycomb Alpha Avionics Switch Bug - Bugs & Issues / Hardware - Microsoft Flight Simulator Forums for example.