I am having issues with my Dynamic Duo, it acts like its collecting Orange Candies however the times it not even there its just all zeros. I have had this issue for weeks and thought maybe the updates would fix it, still not fixed and all updated.
Yes, like @bearwithme mentioned I would firstly try if changing buddies would help to resolve the issue. If not, I would still recommend waiting for the next game app update as our Developers are currently looking into improving this feature.
If the next update doesn't work, give these steps a try. They usually help to resolve most in-game issues.