Sometimes can't select image in header

Sometimes I can select an image in a header but other times when I click on it, nothing happens.

What’s up with that?

I ran into this problem again. It is possible that this may happen when the image appears to be in the header but it actually is in the body. If this is the case, I think the solution is to place the image in the header only after increasing the margin enough so that the entire image can fit.