The patch released yesterday fixed the issue of customers paying single serving price for all servings. However, the customers still purchase all servings from the food display cases as opposed to buying individual servings like they do from the selling table in Home Chef Hustle. This doesn't work great for running food related businesses like a café or candy store. It would make more sense for sims to buy individual servings. And I don't think you should have to make your sim grab a serving of candy and try to cancel it before they start eating it to be able to sell individual servings of candy with the new pack.
The HCH selling table still works as intended and starting a food sale through that pack makes the customers buy individual servings.