Set Native Size in UI

Hello. I found a strange behavior of images unside UI. For example i have t$$anonymous$$s scene:

Image have "stretch" rect and image resize by parent element. But if i set "Set Native Size" by image - rect becoming a country:

All anchors set to left-bottom corner and rect set to fixed. It`s ok? I expect that the elements will be in the center of the anchor zone. Can fixed it?