Viber icon cannot be hidden

[7system7]

Describe the bug
Install Viber from AUR. If you set up to hide the Viber tray icon, it will be appears again on reload.

Screenshots

Desktop (please complete the following information):

• Distro: Arch Linux
• GNOME Shell: 46
• Extension version: 30
• Display server: Wayland

I read the compatibility note: [✓]

[7system7]

OK, I figured out that, if I use this env QT_QPA_PLATFORM=xcb before run the app, then it does not work. If I do not use that, it works flawlessly.

The problem is that, on Wayland the Qt app's window decoration is so ugly, that is because I use to forcing use X11 window decorations.