The game keeps on "forgetting" my progress on major objectives. The latest one was collect 21 weapons for a lunchbox. I had collected 6 or so, and when I come back a few hours later it's forgotten everything, very very frustrating! It's done this before, with missions that can take a long time to do. Anyone else have this? Please fix in the next game update

Your mission is "Collect 21 weapons from lunchbox"? or just "Collect 21 weapons" ?

He needs to collect 21 weapons in order to recieve a lunchbox. I can't say that i experienced this but I suggest closing your current game. Completely close the app and start it again. I know this sounds corny but it is the first step to troubleshoot your issue.

Oh sorry, i read bad. What device you are using? and whats your iOS? I think it's the first thread of "game forgets objectives".