Created attachment 110611 [details] Picture of the issue using Adapta KDE The text of the tabs and some of the Advanced options are white on white if using a custom theme. I don't think it's a issue generated by the theme himself, but by the implementation of it. Replicable with Breeze (by Manjaro, got it from AUR), Adapta KDE and many other themes. See the attachments. More pictures on imgur: https://imgur.com/a/aPQaX
*** This bug has been marked as a duplicate of bug 388766 ***
Created attachment 110612 [details] Another image of the issue on Adapta KDE
Created attachment 110613 [details] Another image of the issue on Adapta KDE
Created attachment 110614 [details] Issue on Breeze (AUR)