When I set yakuake height to 100% on X11 then it covers the whole screen except for plasma panel. On Wayland, yakuake window is even larger and some parts get covered by plasma panel. Not sure if this can be easily fixed, since Wayland makes it hard to get info about other windows...
*** Bug 397355 has been marked as a duplicate of this bug. ***
Bug persists. yakuake 3.0.5 Operating System: Arch Linux KDE Plasma Version: 5.15.2 KDE Frameworks Version: 5.55.0 Qt Version: 5.12.1