No, I haven't. I didn't tick that box at LMS settings. Also, that would mean all quizzes would have this. It's just this one quiz.
I added a link to
this ticket, Alex took care of it back then. Two years ago... It has to do with one specific H5P quiz type, I think. Only that one specific H5P quiztype doesn't show a NEXT-button after completion. All other quizzes do.. But, to make it more difficult: it only happens in this course: https://meestergijs.nl/item/chunks4/ not chunks1, chunks2, etc. But all settings are the same! Weird...