Possible fix for crashing/installer not working

[TheOriginalBurgerKing]

Hello, I might have a possible fix for a lot of the crashing and installation issues.
I couldn't install the app as it kept crashing when downloading a few % in, but enabling the "Background" setting in Flatseal under Portals fixed the installer. (#1181 (comment))

I tried toggling off the Background setting after install, but Steam would just crash after loading the main window regardless if opening via shortcut or terminal command.
Re-enabling the background setting seems to have resolved the crashing.
It looks like background is disabled for flatpak apps by default.