I first did the "Smelt Everything" achievement, and some days later I ran through the achievement list and noticed that I hadn't gotten the "Delicious Fish" achievement, even though I'd smelted loads of fish (of both types) and eaten the cooked fish.
To get the achievement I had to manually place the fish into the furnace, and pick it up, before eating it. It didn't work when the fish was automagically placed into the furnace using a hopper from a chest, and removed using a hopper into the chest, and then eaten afterwards.
This is not related to MCPE-10840, as I got loads of other achievements before and after the already mentioned issues.
Comments 3
Cannot reproduce, as I've already gotten the achievement. It should be easy to reproduce following the steps, and if they are not clear enough please ask and I can try to enlighten you.
This is a bulk resolve of issues that haven't been updated to 0.16.0+ yet. Please comment below (To open the ticket) and update your affected versions. If you cannot reproduce the bug, please write in the comments so we can resolve it as "Cannot Reproduce". Thank You!