This has also driven me mad before I figured out exactly what was happening. Sometimes I drop something into a centre aligned auto layout, and I want just that element to appear on the left of the frame, so I just make it fill the parent frame – now that stretches the (normally png) element that I’ve placed wasting time and looking bad

An additional vote not to set child elements in AL to Fill. I often don’t want that, and it’s quite annoying to have to go figure out where things reset to Fill, and then set them to how I want them.

I wish there were more topics about this, it’s been driving me crazy for a few months. Created a topic (which you replied to) that didn’t get much traction: Applying auto layout to component sets results in unwanted behavior