While in creative inventory, if item is picked up it dissapears

If in creative mode inventory and item is picted it dissapear (it will not show in players inventory).

 

Best way to test this is to set cursor to look at sky because when item is droped in this position  it will fall to the ground and it will be picked up. Go to brewing screen and press Q (or any key for droping items) on any potion 15 times and wait until all items are picked up. Now if you go to survival inventory items will not show up.