dbms_pickler.get_type_shape executed from SOA server to EBS DB creates latent high load

Whenever our SOA server is running, the following can be seen running at steady high load on our EBS database.  Shutting down SOA causes it to go away.  Is there a way to determine whether this is a bug, known issue, or just a poorly-profiled piece of code?

Current SQL statement:
Previous SQL statement:
        begin :1 := dbms_pickler.get_type_shape(:2,:3,:4,:5,:6,:7); end;