Armor stand with enchanted diamond armor disappeared

My armor stand with enchanted diamond armor disappeared. IT was holding  a helmet, chest plate, leggings, boots and a sword. All diamond and all enchanted. Last time I played was two days ago. I went exploring, trying to expand the maps. I came back to put the stuff away and logged off. When I log back in 2 days later, the armor stand is gone. Let me know if more information is needed. Thank you!