Hi were you able to resolve this issue?

I have a similar story. I'm on the phone with Chase right this second to figure it out.
I purchased tickets through Chase Ultimate rewards using points+cash, and later called in to add a lap seat infant. Paid 10%, which was like $180. Got a new confirmation email, but no ticket number. Going to Korea.

My flight is in a couple days, and I noticed there was no ticket number attached to my daughter's name on the itinerary, so I called and now they are reading the case etc. and I am on hold.

Chase is a mess.