MacOS Full/Split Screen Issues

Noticed that full screen mode in MacOS High Sierra 10.13.4 is very fruity. Sometimes it works, lots of times it doesn’t at all (just enlarges to max but not in its own desktop), and split screen doesn’t appear to be supported.

What do you mean by this?

If I understand what you are saying, this is exactly what that mode is supposed to do. Can you be more specific?

It works perfectly for me.

The Manager full screen / split screen issue that was plaguing me last night is no more. I’m at a loss to explain it. It’s working perfectly this morning. Please disregard.