Yesterday I found a buggy place with appearing and disappearing treasure chest with 2 hostile crocodiles.
Depending from my actual position on the ground (step right - step left) and range from chest, the chest/crocs appeared and disappeared.
When crocs fully appeared they were instantly hostile, when I made step left - they disappear (even if they already started to attack me).
I could repeat that forever. After few minutes I killed both crocs - sadly the chest could not be interacted and looted, no matter from what side I tried to reach it, it tend to disappear after I reached some fixed range.
Pictures (see a place on the mini map):



Location: Seaside Sanctuary Vet area, PC EU
PC EU (PL): 14 characters. ESO player since 06.08.2015. Farkas finest quote: "Some people don't think I'm smart. Those people get my fist. But you, I like."