Thank you for your answer.
Yes, on my computer, the whole 720x576px is visible. After some research I also came to the conclusion that it is probablly overscan.
So, the only real solution would be to tweak the animation a bit, so it doesn’t fall out of the Action safe area? Or, did I make a mistake in my workflow maybe? I have never downscaled from Full HD to brodcast PAL before, so I found that workflow online.