F5 APM Certificate Checking

On F5 APM, I have an issue where the F5 is only checking the first certificate in the certificate store. If the correct certificate is on top, it works else it fails because F5 is not searching the entire store for a valid certificate.

What is the best way to configure the certificate checking policy?

I read somewhere that configuring a match issuer should work.

Can someone please confirm this?

Also what is the syntax to add the Issuer. I have two Issuers I need on the list.