Hi…I’m new here.

The only “issue” I’m having with Plasma is with the window decoration. As you can see from the picture, there is none. So, when I have multiple windows opened, it's hard to differentiate one from each other.

https://imgur.com/7ankPqk

I’m using the latest Manjaro stable (5.21.2) with none Desktop Effects and Compositor is disabled.

Is this only me or is it the way it is?

Cheers.

Which Global Theme, Window Decorations, etc do you use? I have no problem at all using the default Breeze Style, ditto for Breeze Dark and Breeze Twilight, but my System Settings are configured to use the Sidebar View.
There are indeed no separators in the Icon View, but since I haven't used it before I would say this is intended, not a bug. My Window has a shadow, though, but my Desktop Effects are enabled.