It appears that snap to edge works on rainmeter panels, which tends to cause some interference in their placement. Im not sure if theres a way to prevent the snap feature from working with rainmeter panels, but it isn't needed as rainmeter has its own built in snapping functionality.
(the panels aren't valid snap targets, but they can be snapped to the edges of the desktop work area)

I mean the user can always turn off display fusion when modifying their layout... but if the situation can be fixed easily, its better than everybody having to spend 10~ minutes figuring out to temporarily disable the snapping feature

3.0 beta