Denied Editor Background

I'm not sure why this is a thing. I also have Sui's editor sometimes, but I remember for a little while I had the white thing (which just looks like mybb's default editor)
Maybe it's something to do with v4 & some "early access" we're getting without being told. But I doubt that.
It is extremely jarring you're not wrong. Nbb has had a lot of those things through the years. It's confusing why ppl still get the white one