Mono's Support with cipher suites

In one of the apps the app-server handshake is failing to occur where as another similar app works well.

Both the apps are pointing to 2 different servers having SSL enabled on the server. It is observed that both the servers use different cipher suites.

Fails on - TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA, 256 bits, TLS 1.2

Works on - TLS_RSA__WITH_AES_256_CBC_SHA, 256 bits, TLS 1.2

Exception received on the app -

System.Net.WebException: Error: SecureChannelFailure (The authentication or decryption has failed.)

I found the below link which mentioned about Mono's support which ECDHE/DHE cipher suite.

Link - https://bugzilla.xamarin.com/show_bug.cgi?id=42805

Please guide me to resolve this.