Cut and copy sometimes don't work at X11 session
### Affected version
Manjaro Linux
DISTRIB_RELEASE=19.0.2
mutter 3.34.4
X11 session, because I'm using Nvidia proprietary drivers.
### Bug summary
Using LibreOffice, I founded this bug when trying to copy text (as you can check on the screencast). Sometimes the copy fails, resulting in the previous text being pasted.
Now I have to copy twice each time that I want to copy a text, just to be sure.
### Steps to reproduce
1. Open LibreOffice;
2. Write some words;
3. Copy one of them and paste, one by one;
### What happened
Sometimes the previous text copied will be pasted.
### What did you expect to happen
Paste the last text copied, every time.
### Relevant logs, screenshots, screencasts etc.
https://cloud.disroot.org/s/FJewEbqrmj2Qfmf
https://cloud.disroot.org/s/WADJ56549X7P5fg
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issue