Yeah I lost the plot at this point 
Though your GPU seems pretty capable. And considering the project has been barely started, and also how specific the situation is for the issue occur, RAM also seems irrelevant actually. The only thing comes to my mind would be that fluctuation thing but why would it not happen when you exit while not running. Yeah back to code I guess But it’s really hard to say anything else with these limited informations. I mean… especially if @ClockworkOcean is silent 
I think there’s more debugging to do on your part