I get this bug from time to time, when putting item/s to the store they sometimes are invisible and I'm unable to cancel my listings, like on the screenhot - 2 of 30 items are listed but not visible on the list. Helps only to relog or /reloadui. I use guild store to quickly share crafted items between my characters, I put item to store, move to listings and immediately cancel so the items appear in mailbox later. With this bug I can loose my items because in time I need to relog/reload someone could take my items from store (I list in lowest price to avoid loosing gold on tax).
PC EU (PL): 14 characters. ESO player since 06.08.2015. Farkas finest quote: "Some people don't think I'm smart. Those people get my fist. But you, I like."