The behavior of the attributes when moving/swapping tiles on the canvas is a bit buggy when moving tiles with different palettes together
Take the first image as an example:
https://imgur.com/a/aO1I3Gq (it complained about the size)
Now, if I move the square on the right around a bit (yes, I moved it with Apply tiles), the attributes have moved an unexpected extra space down and right. In theory the green attribute cells should have been easily able to stay in the same relative position, because the alignment to the attribute cells is the same. I assume some coordinate/index calculations are at fault here. This is version 3.6.4, if the window title is not legible enough