For some reason this happens every time I load this particular project.
are you fat shaming the blocks
No
That's weird, this happens when you go to a sprite with many scripts, go right, going to another sprite, then go to that sprite again, then go left. It's nothing to do with fat blocks.
Apparently deleting the other sprite fixed it.
sounds like you're fat shaming that script
smh (/j)
What?
That happens to me sometimes after pressing undo.
Okay. (That link is blocked, but I found a post by jan Misali about it.)