Shopkeep says they hav new inventory; they do not

This has begun happening only recently (last couple of times I’ve logged in). I run past the shop. The keeper says, ‘I have new inventory!’ or one of their other lines. I check the shop, and it’s the old inventory. Once, I checked after he said it, it was the old inventory, then I closed it, waited a bit, and opened it again. It was still the old inventory for a moment, then changed to a new one.