As soon as we set "Breeze" in Systemsettings5 => Application Style => Configure GNOME/GTK Application Style... there is no shadow in GTK right-click and GTK menus.
Workaround: Set GTK apps to use Adwaita theme, but this degrades coherence and user experience.
Assigning to KDE Maintainers.
Must be land in Errata as can't be fixed until release.
Ping Morgan for Errata
How to set GTK apps to use Adwaita theme?
(In reply to Morgan Leijström from comment #2)
> I will.
> How to set GTK apps to use Adwaita theme?
They are already set by default to Adwaita in facts. But, if a user wants that it is set to Breeze in order to have better coherence accross all GUI app, it will find this bug.
This is set in Systemsettings5 => Application Style => Configure GNOME/GTK Application Style... button.
I wrote this BR because we will get it later.
Roadmap for upstream Plasma Devs is to have GTK apps use Breeze by default.
Some application as an example of what happens??
I do not appreciate this error in my installation in GTK app
Ok, I have seen that this appears in GIMP for example, but no appears in Firefox and Libreoffice.
Perhaps this depends on which version of GTK the particular application uses?
This appears in all GTK apps that use Breeze theme.
It's a bug in Breeze-GTK not in Adwaita.
Normally Libreoffice uses correctly the Breeze theme under Plasma since Mageia 8 and Firefox uses Adwaita by default under Plasma.
The bug occurs since user changes the theme under Systemsettings5 => Application Style => Configure GNOME/GTK Application Style... button.