Tangram
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Tangram version
1.4.2
Linux distribution
Manjaro KDE
Flatpak version
1.12.7
Desktop environment
KDE Plasma 5.25.1 Wayland
Screenshot

How did you install Tangram?
I installed the Flatpak app/re.sonny.Tangram/x86_64/stable from Flathub. Technically I used Manjaro's gui package manager "pamac" to do it, but I suppose the result should be the same as with the flatpak cli.
There is really nothing I can do about this. Please get in touch with Manjaro.