Clicking "Show Details" from GNOME applications menu does not work for Flatpak apps
It looks like that right clicking a Flatpak app icon and clicking "Show Details" to view the application's page in GNOME Software does not work anymore for Flatpak apps. It works fine for regular apps, but for Flatpak apps it fails to find the app by its desktop file. See this screenshot:
I have tried this on multiple machines running Fedora 29 and Fedora Silverblue 29 (all running gnome-software-3.30.6-1.fc29.x86_64) and there was the same issue on all of them. I also tried searching for the app by its name in GNOME Software and it worked without any issue.