First things first, I'm on Android 7.1.1.
Galaxy Note 8
My Colony ver. 0.50.0
What happened:
I'm not sure if it was by design, but when you select all of your food storage Silos and select "Upgrade All" immediately all of your resources deplete down to whatever base amount you can hold, Such as 850 Food. Now I wasn't necessarily thinking it was a bug until I had lost all the sugar I gained through the Evil Galactic Emperor's tactics. Now I lost my sugar and my nefarious scheme to take him down.
I'm still pretty early in my playthrough, so I have no idea where sugar comes from, but I'm sure I'll get it back eventually.
Its sort of a bug. Its because when you do an upgrade all, all of your storage capacity disappears. It will be better in the next update
Owner of Ape Apps, LLC
I think one thing that I think ape apps should change about My Colony is making the Aluminum generator, generate more Aluminum.
maybe upgrade all should not destroy the buildings until each one is reached by a builder?