Black Artifacts in Windows App on KDE Wayland

I am trying to run a windows app on lutris, TickTick to be specific. The native linux app is an electron wrapper and it does not have lot of essential features.

The app runs fine on Gnome (wayland or xorg) and Plasma xorg. But on Plasma wayland, there is are black border around windows.


I am running it in lutris flatpak version to run it.

1 aur/ticktick 6.0.0-1 (+16 0.42) 
    Official desktop application for Linux

???

It has lot of missing features compared to windows version.