Digital Signature using openssl 1.0.2u is different in 11.4 from 11.3 ? Any specific setup required?

SunOS IHYDSUNT5-04-LD01 5.11 11.4.22.69.4 sun4v sparc sun4v .

Our application( C code) uses openssl libraries to generate digital signature for messages.

For this we use SHA256 and PKCS7 and below functions of openssl.

On Solaris 11.3, the digital signature generated properly and it is getting verified.

With same message,hash algorithm,certificate used in Solaris 11.3, the same application is generating a different 

digital signature in Solaris 11.4.We also tried disabling the FIPS to check 

but the signature in 11.4 is not same as one in 11.3. Kindly help.

Openssl version on Solaris 11.3 = OpenSSL 1.0.2o  

Openssl version on Solaris 11.4 = OpenSSL 1.0.2u  

(SunOS IHYDSUNT5-04-LD01 5.11 11.4.22.69.4 sun4v sparc sun4v )