Big-IP header authorization size is limited ??

Folks,

 

I have an iRule that pulls access session variables, base64encode and inserts into header as authorization. It was working fine until we start to receive too many values in the access session variable. I can see all the values in the session variable under event logs but the authorization is sending only 880 bytes of base64encoded token to backend servers (Cutting half of the token). My http header size in the profile is set to default and current header size not even near to that value(32768Bytes).

 

FYI- the incoming session variables are SAML attributes and i'm setting variables(set x [Access::session data get "somesamlvariable"] ) to store these saml attributes and sending them in the header as auth header.

 

Any help is appreciated!