Failed to receive SAML response by HTTP post

We are encountering “Failed to receive SAML response by HTTP post” exception message with .NET Framework 4.7.2

we are Unable to get the response using ReceiveSAMLResponseByHTTPPost Method for SSO Implementation,

TraceLogs attached !

With .NET Framework 4.6.1, response Elements for ReceiveSAMLResponseByHTTPPost works perfect,

I doubt the issue is related to the .NET framework version.
The log shows the following being received:
GET /AssertionInternal HTTP/1.1
The referrer is:
The SAML response must be sent in an HTTP Post with SAMLResponse post data.
I suggest using the browser developer tools to capture the network traffic to determine why you’re receiving an HTTP Get instead.