Can't OLCI with AA leg in PNR?

OLCI for my JFK LAX flight tomorrow won't work and the nice people at the platinum line, who checked this out with web support and 2 supervisors, came to the conclusion it is due to the AA leg (I continue to SAF) on the PNR.

I guess I find it hard to believe that I cannot check in online for the Delta transcon flight so I was wondering if anyone else has run into this or if anyone has any ideas?

Thanks in advance!