Anyone elses game keeps freezing/crashing when you're creating?

This has been happening for a while now and its very discouraging. The game will randomly crash when I'm creating or using the maker pen. Just now I had only spent a few minutes, just recoloring a vehicle, and when I hit the undo button the game just freezes. Is it because I'm using vehicles? I tried making decorative attachments last night for a vehicle and I couldnt even make and edit one shape without the game crashing