Tried to combine my points between two already linked Ink cards before calling Chase to transfer them to my personal CSR. Have been doing this a few times successfully, but today (and a week ago when I first tried) I got this error when clicking the Submit button on the transfer.
I ended up just calling Chase and having them do the transfer from each card separately to my CSR; the agent had no explanation for this problem. But the whole points combination feature appears to become more and more fragile.