Welcome to All Things Plants,
@ChristophGielen !
Although I don't know what the bumps are on the leaves, I believe what you have there is Thunbergia alata (Black-eyed Susan vine), not Rudbeckia hirta -- which is the wildflower "Black-eyed Susan."
I can't tell from your photo, but the little "bumps" actually look to me like they could be tiny insects of some type, possible juvenile aphids?
