SpriteManager leading to overlapping sprites

[redeller]

Hello, I am running into a problem with overlapping sprites in my screens in renpy. I am using SpriteManager's method like so (if spritemanager is named af_sprites)

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t = Transform(child = "../images/imagehere")
af_sprites[-1].set_child(t)

this is for whenever I update the animation of a certain sprite on my screen. It works perfectly fine at first, but if I reload the screen in any way (either because I restart the minigame, or load a previous save and go there), the past children of the sprite start overlapping? Like past children just show up behind the current child, and I have tried renpy.restart_interaction() but it doesn't seem to change the overlapping problem. Any ideas?