When you drink/eat something (not sure if straight from vicinity or from bag) the food/drink item is *invisible at 0% and you cannot use the slot it was previously in.
*I know this as when I relog I see the slot I could not used filled with 0% drink item
I have seen this MULTIPLE times
Only with drink so far
Drink item (test drink from vicinity and from backback) and notice that slot that contained drink can't be used
This affects gaming experience as not all , for e.g. bag slots, can be used unless relog! this results in anti-hopping timer
Happened to me also. I took something from my vicinity, but it never really appeared in my backpack, but then I tried to take it again or any other object since it was unusable.
This has been reported previously - make sure to search before opening new issues.
I am closing this as duplicate of #0008300: Inventory retains invisible 0% food items making slot unusable
Please vote up the original issue to increase visibility, and add any extra information in the notes section.
Thanks