height < width doesn't work correctly

[robtfm]

when height is less than width, it seems like the height is set equal to the width. this is from the change_size example with the size being output to console:

this is on 0.10 - i couldn't see a main-tracking branch. i tried to dig into it but couldn't see where the issue came from. may be bevy's UiImage looking to aspect ratio before container size?

thanks!