[ubuntu] I can't format texts in an email editor or a browser address bar. They disappear
I installed Ubuntu in December 2018 after Windows 10 destroyed my hard disk.
I rarely encounter serious errors. But one problem is persistent and random. As you can see I could format texts here. But if I format texts in an email editor or even some other editors provided by other websites, after I double click on texts to select them, they immediately disappear as if double click means delete, or if I use mouse left button and the cursor to select the texts, the texts disappear after I click on any type of format.
I couldn’t format the texts.
It happens frequently and randomly.
It happens either I use Firefox or Chrome browser. (It happens only to browsers, never software like LibreOffice.)
It has been about a year.
I have uninstalled both Firefox and Chrome and reinstalled. It doesn’t help.
I searched in this forum and on the Internet, but no luck.
Does anyone know how to fix?
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