I think I know what's happening as of lately. With the polymer $5 and $10 notes only a couple of weeks away from their first releases, and the BoC having so many crisp $5 notes in stock, I have a feeling that, during the final weeks of the Journey $5's, the BoC is likely aggressively clearing out as much of the unissued crisp $5 Journey notes as possible before the changeover to the new Polymer version.
It seems to be quite common that my local banks' final shipments of old issue notes are usually a shipment of crisp bills to close it off. I have a feeling that my local Scotiabank will receive a shipment of crisp $5 and $10 bills as the official final shipment (if they do receive their final shipment within the final 2 to 4 weeks of the Journey era) pretty soon, if they haven't already.
I feel quite confident about the Polymer $5 notes coming to my local branch soon after its release, but the $10, I am totally not as confident, since the branch's shipment of $10 notes goes (much) slower, given the $10 notes' very low demand and how they don't buy anything except for Starbucks and The Second Cup items, items at a bar or pub, and fast food meals.