Scheduled, weekly recurring tasks are not displayed in GNOME Calendar even though syncing is enabled

[4jNsY6fCVqZv]

Neither in the monthly nor in the weekly view of GNOME Calendar.

Planify 4.17.0 (Flatpak)

[4jNsY6fCVqZv]

Is it currently only possible to synchronise a Planify project with exactly one GNOME calendar at a time?
Because when I select the sync function in the menu of another Planify project, I only have the GNOME birthday calendar as an option, but not my actual calendar, which I was able to select in my first Planify project and which is already mirrored in GNOME calendar.
That would explain my issue, as the scheduled, weekly recurring task is located in another Planify project.

[4jNsY6fCVqZv]

I had expected the feature to work in such a way that activating synchronisation would mean that all my scheduled project tasks would then also be mirrored in the GNOME calendar. Or at least that it would be possible to assign multiple Planify projects to the same GNOME calendar.