Pretty sure most of you already know this but for those who don’t: you have two clipboards in Linux. One is the traditional clipboard where you copy with control c and paste with control v. The other one is when you highlight text and use the mouse middle click to paste text.
More details here.
By CMD, I mean the windows key. I am using Opensuse Tumbleweed. I thought I was just using the default clipboard, but I guess I’m not 100% sure.