Armor stand issue

Armor stand issue
i expected the armor stands to be fine

it turned them invisible
i placed 2 armor stands, both with enchanted diamond armor then i died, when i went to grab some armor the armor stands were gone, confused i tried to place another armor stand, it wouldn't work. then i thought that maybe it was invisible, so i broke it through the ground then it appeared as it fell

Steps to Reproduce:
1. place an armor stand
2. die
3. look where the armor stand was