wallet ticket not auto updating when there are more than one ticket in the apple wallet

I'm developing apple wallet boarding passes and I'm testing automatic wallet update feature when seat/gate number changed on the pass.

I noticed when I have only one wallet ticket and then push to apple APN, iPhones receives wallet ticket change notification and wallet ticket updates with new changes.

However when I have more than one passes in the wallet, it doesn't get updated. I have checked my responses for `list of updated ticket serial numbers`. I'm returning only the serial number that was changed.

Has anyone experience this? How I can resolve this?