[TFT] Some item boxes stopped showing which item they were

In a recent TFT game I played (the most recent one as of this writing). at one point my item boxes stopped showing what item was in them. I could mouse over them to see what they were, and when attached to a champion they displayed correctly. Item boxes that I received after the problem started were unaffected, so I think it must have been a one-time glitch that only affected items that were sitting there waiting to be attached to a champion when it occurred.