I’ve seen a few of these screenshots and a lot of them are re-used just cropped, likely single player for the memes. Items have a unique ID and if there are 2 of that unique ID in game it will poof one of them, unsure though if this impacts stashed items (it used to)
If so then I’m trading all my runes to my pal at 8:59AM then having cain ID shortly after. I lost a ber twice due to this bs