Due to the origin of the sprite, when using sprite.set_hflip("#sprite", self.last_horiz == -1), the sprite flips all the way to the other side, completely out of the collision box. Is there any way to change the origin of rotation? Or is that feature still unimplemented?
If it still is unimplemented, is there any way to fix this issue with the current tools?
Use collections instead of GOs then use collection factory instead of game object factory. Then you can parents GOs to each other in the collection and use them as pivots for sprites more easily.
I was able to fix this by creating a new parent go for the sprite in a collection and displacing it in the script whenever the origin flipped. Thanks for all the help!