MCR codes from Coke Zero appear as generic or Powerade codes when entered

My Coke Rewards often has special incentives tied to codes from particular brands, like the current Kraft/Coke Zero double points. However, in my area, all the bottles are either sporting a generic white MCR cap (shows up with all the main brands as a choice when entered on the site) or with a black cap that always shows up as a Powerade without offering a chance to pick a brand.

Any idea why this is going or when we can expect it to be corrected/fixed? I'm a Coke Zero drinker who hasn't gotten a single double point the entire time the promotion has been going on because of this. Many thanks!