Hello, sorry for my english. It’s Google translator 
I hope you understand me.
When item drops out from monster in adventure journal->items in front of the monster picture written “Obtain 1”. But after relog - always “Obtain 0”. If drops out one more the same item, then written “Obtain 1”. And then for this item counter is working correctly.
You must have items with “Obtain 0”. Look in your adventute journal.