The firmware version is 4.91, running Daisenryaku Daitoua Kouboushi [BLJM61265] v1.0, and the Flathub release does not show the opening animation, however, the official APPimage binary does.
You can see in the title that the two binaries are also different. The official binary is HEAD and the Flathub binary is master. this can only mean that the source code checkout channels are different.
I also noticed that for both binaries, the GIT revision is the same. This is also very confusing to me.
While it is true that the Flathub release is build separately from the AppImage, following the Flathub policy to build Flatpaks from source, this doesn’t necessarily mean they are different.
HEAD is not really an checkout channel. With Git, you can checkout more than just branches. If you run a checkout on an commit id, it will enter a so-called “detached state”, where it is not on a specific branch. In this case, the branch name will be HEAD, as the commit is the only reference point, not an branch.
The difference here is most likely in how the CI is doing the checkout. The code being build should be the same though, as the commit id is the same.
That aside, this is an issue regarding an specific app. You’d more likely get assistance by using the Help channels for that app. You can find links to them in the Links section on the app page.
If you’re certain the issue is related to the Flatpak packaging (and not just configuration, etc.), you can also report it here: