Retake quizz / restart game

Hello,

is there only me who cannot retake a quizz / restart a game ?

I cannot even do it with my own quizz/games (and I don’t limit them to only 1 response)

Following games I’ve created (not limited to only 1 response):

https://kisskh.at/games/3oxD5tP4

https://kisskh.at/games/1gjzMF84

https://kisskh.at/games/1ejxKfYL

And following ones from other member (button start game is inactive after playing once):

https://kisskh.at/games/LnnEECoL

https://kisskh.at/games/8qLjIb

Other games have no start game button at all after playing once so I suppose these ones have been set up with a limit to 1 response. 

Thanks in advance for your support :)