Unity UI Memory allocation on UI Image

I'm doing a performance check in my project and I want to understand and mitigate the allocation that the game is making. I found that whenever I change a sprite from UI Image component it makes a SendWillRendererCanvases, and the change in Sprite result in a change in Material that allocates memory. Is this necessary? Is there a way to avoid it?

 

I found that in the build this does not occur, maybe it's a problem in profiler or how Unity UI works in the editor.