Cuz all I know is system is kinda overloading and start to pretty laggie then boom it crashed. So maybe it the multiple animation working at once or something else so if you can check that out or maybe find the problem I will be more than happy about it. It should help you for the next update and help those who might get the same problem like me in the near future, and you are right Ren'Py don't consume a lot, might need to check that out what going on , am sure it will help. Thanks