This one is fairly repeatable in the sense of- If you attempt to cut wood for logs or boards and your inventory fills up, sometimes when you right click (Seems to be worse if you move during) to place a stockpile- The stockpile image will appear where you want to place it. But you can't click or interact with anything as the last held inventory item sticks to your cursor and you can't use the hotkeys to drop the item- nor actually place your phantom stockpile and it takes a lot of moving/right click spamming or relogging to fix.
I'm fairly sure this affects any and all stockpile items as well. It seems to crop up the most when you attempt to stockpile things with any inventory overflow on your cursor in a valid location but your pathing to place it isn't 100 percent clear as well.