This is a common bug with apps on Wayland session of KDE Plasma. Possibly the following link can help you to fix Pinta.
https://community.kde.org/Guidelines_and_HOWTOs/Wayland_Porting_Notes#Application_Icon
This is a common bug with apps on Wayland session of KDE Plasma.
Possibly the following link can help you to fix Pinta.
https:/ /community. kde.org/ Guidelines_ and_HOWTOs/ Wayland_ Porting_ Notes#Applicati on_Icon