Graphical glitch on logout window

Hi,

I have a graphical glitch on the logout window. The “cancel” button is partly blue, as you can see in the picture:

Is this a common issue?
How can I fix it?
I already turned off all extensions. It doesn’t seem to come from a shell extension.

f40, gnome hinzugefügt

3 posts were merged into an existing topic: Logout button changed