Problem with item not dropping

[voin947]

I've been having a problem with certain actions not dropping an item.

First after i was able to pick Glow Berries once, all berry-like blocks stopped working. That means after i click a Vine (or a metalberry bush, or a sweet berry bush) it's state goes to whatewer it was supposed to(For example 66% growth on Metalberries), but nothing drops.

First i ignored this issue, because it didn't affect gameplay too much, but then the same thing happened when i tried to pick my Mekanism machines using Configurator. I was able to pick the first machine, but after that another 4 machines just disappeared without dropping anything.