We have opend a SR. Its not only TLS 1.2.
The entire TLS communication is faulty after we installed Patch2.
Maybe it's our configuration.
The problem was our configuration. The correct wildcard domain entry was missing at the end of the TLS list.
Our last entry looked like "0.0.0.0/0"
The correct wildcard entry must be: *
The support did a great job. Now everything works fine.