Description:
The "clone formatting" icon crushes my desktop session and sends me to log in screen. Even worse, I can't see any text on the login screen at that point. I only see the password input field. 
When I input the password and press enter, I log in to a fresh desktop with all programs closed and all unsaved work lost.

Steps to Reproduce:
1.Type something into libreoffice writer
2.click "clone formatting" icon
3.

Actual Results:
The screen suddenly blacks out. When I move the mouse a bit, the screen flickers a bit and then takes me to the login screen. The login screen has no text at all. I only see a password input field and two unnamed buttons

Expected Results:
Copy text format/style and paste it where directed to.


Reproducible: Always


User Profile Reset: No


OpenGL enabled: Yes

Additional Info:
LibreOffice
Version: 6.3.5.2
Build ID: 1:6.3.5-0ubuntu0.19.10.1
CPU threads: 12; OS: Linux 5.3; UI render: default; VCL: gtk3; 
Locale: en-US (en_US.UTF-8); UI-Language: en-US
Calc: threaded

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