Icon missing and Fullscreen not working

Not sure if I should have separated this into 2 issues, but they seem connected so . . .

This is related to issue [#179](https://github.com/flathub/com.spotify.Client/issues/179) which was closed, but is still an issue on both of my computers. Ubuntu Budgie and Ubuntu Gnome Flashback. Toolbar shows the generic icon, except for a few seconds upon closing the correct icon briefly appears. Also clicking on fullscreen does nothing. I thought the 2 issues might be related since in the deb version the icon problem also happens, but after clicking fullscreen (which works in the deb version) the correct icon appears and stays until Spotify is closed. Fullscreen must be engaged again upon repoening Spotify for the correct icon to appear.