Ok, just from the start: I switched DNS away from EZOIC, because the other supporter was the opinion, that the redirection problem is based on my hosting. If that would be the case, the redirection-chain would still be visible…
BUT: it is not, because i moved away the DNS from EZOIC.
FACT: the redirection-chain only appears, when I switch to EZOIC, which means, the problem is located on YOUR site.
I will switch DNS back to EZOIC now, so you can continue looking for the technical problem. And I hope, I will not again get the answer, that the problem is located on my site… that really sucks.