If anyone uses mobile boarding pass the op-up is automatically updated on your mobile boarding pass.
(For the past 2 days I have been frantically reloading my mobile boarding pass. Called in to MPC T-55hr CX829 YYZ-HKG and scored a mileage upgrade to PEY, and then ~T-90mins scored the op-up to J (haven't arrived at airport but saw it on my mobile boarding pass)