All,
I found the culprit
exchange_key:
User error, I used the wrong key from my IDP, why it worked on the other version I’m not sure.
Looking through my IDP’s xml file I found this, so I decided to try it since this was a lab VM and it worked.
Using my SAML-TRACER plugin no issues were shown.
<DigestMethod xmlns="http://www.w3.org/2000/09/xmldsig#"
Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
<DigestValue
xmlns="http://www.w3.org/2000/09/xmldsig#">8nZHHDNt2HUSETHISONEQPD01eCWS8NfSsmfBwBFQ=</DigestValue>
</Reference>
</SignedInfo>
Closing this ticket out, Sorry to bug you guys.