22.7.3/4 Update ACME fails

[PotatoCarl]

Hi
I am using ACME to update some Let's Encrypt certificates. However, despite claiming to have the new signed certificate, the certificate in the certificate store is 2 months old and invalid now.

When I try to use the test signing facility of Let's encrypt it is no problem to get the new one. But with the "real" one he just sends "all right" but neither stores the correct one in the certificate store nor (obivously) copies it to the server in question.
Any idea?