Sometimes when I try to copy something,then it just isn't in my clipbard. And no,my keyboard isn't broken,the same thing happens when I copy something with my mouse. I am on wayland arch kde 5.22,this bug didn't happen before 5.22.
What text in what app? Does it appear in the clipboard applet when you copy it? --- Side note: You really need to get in the habit of providing more information if you're going to file so many bug reports. It takes up a lot of time to pry the needed information out of you. :) Can you please read https://community.kde.org/Get_Involved/Issue_Reporting?
In many apps,I tested it with firefox and konsole. It isn't in the clipboard applet when I copy it.
If it's not making it into the clipboard, then it's a bug in the app in question. You would need to file a bug on each individual app that manifests this problem.