Shortly after coming back from suspend, I saw this behavior. I would copy something into the clipboard but then I couldn't paste anything. The clipboard was empty. I was getting multiple log lines for each time that I copied something. Sometimes 2 sometimes 3. I did see that I could paste a couple times though when I was messing around in the terminal. But I was never able to copy and paste in firefox.

Resumed from suspend at 9:01. I saved all the systemd logs from that time to my computer in the bugs folder.

May 10 09:03:34 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:03:34 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:03:53 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:03:53 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:03:53 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:04:00 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:04:00 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:04:00 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:04:03 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:04:03 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:05:02 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:05:02 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:05:02 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:05:05 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:05:05 hp1040 env[1233853]: INFO - clipboard updated from display :0
May 10 09:05:29 hp1040 env[2352]: DEBUG - child 1233853 is still alive, as expected.
May 10 09:05:29 hp1040 env[2352]: DEBUG - routinely attempting to kill child process 1233853.
May 10 09:05:29 hp1040 env[2352]: DEBUG - child process 1233853 completed with: Signaled(Pid(1233853), SIGTERM, false)