Shaking GUI Node after adding a larger sprite to an Atlas

So this is a weird one - I’ve noticed that a gui node is shaking: this happens only after I add a new image to its atlas, which holds Character sprites/animations. I’ve noticed that if I increase the margin, extruded borders, and/or inner padding variables it reduces, but does not fully eliminate, the shaking.

When the sprite was smaller (a placeholder) the shaking was nonexistent. The Atlas size is 4096x2048, and the new sprite didn’t change the overall size. Here are the node properties:

Any ideas on what can be done to fix this? I’m contemplating breaking the atlas into smaller components but I’d like to know if this is fixable first.