@laska.bozzolo They are different versions. Different apps are built on different versions. This is not unusual, even with traditional package manager installers.
I also had this issue with two KDE platform packages turning up repeatedly in Pamac GUI no matter what I did, but as suggested above by @a-sassermann
flatpak uninstall --unused
Removed those and now Pamac GUI reports all updates are installed - what hasn’t updated is the Pamac updates notifier in my manjaro Gnome status area. I’m sure it will catch up eventually 