@DoctorG Yeah, I get it. Though like I said - I'm on immutable distro. While it is technically possible to install something with package manager, it's very, very strongly discouraged and considered as nuclear - last resort option.
Apps on these distros are installed primarily from Flathub, then if something doesn't have Flatpak version - from Appimage. If this is not an option - with package manager installed in system installed in Distrobox/Toolbox and then if even this option is unavailable - via layering. It's mostly for apps that need root access to hardware resources like drivers and such.
I'll probably try to install Vivaldi via Distrobox just to test if this bug appears there. Though I have to say - Flatpak works very nice aside this one problem so far 🙂