Strange, installing Flatpaks seems to work fine in 0.11.3-3 now (with gnome-software 3.28.1-0ubuntu4.18.04.1 (the new version is a patch for snaps from bionic-proposed, nothing to do with Flatpak I don't think)). Glad that an Ubuntu dev is on it with keeping Flatpak up to date! :D
Strange, installing Flatpaks seems to work fine in 0.11.3-3 now (with gnome-software 3.28.1- 0ubuntu4. 18.04.1 (the new version is a patch for snaps from bionic-proposed, nothing to do with Flatpak I don't think)). Glad that an Ubuntu dev is on it with keeping Flatpak up to date! :D