Reproduction:
-Stare at an enderman's face.
Note how they don't become aggressive when doing this.
-Stare at an enderman's waist.
Note how they do become aggressive when doing this.
Notes:
This is a parity break between the bedrock and java edition
Related issues
is duplicated by
Comments

They do not want you to see their private parts. Duh.

Okay I followed this over from MCPE-28094. I am having this issue right now (even tho it is marked resolved). I was fighting the enderdragon and enderman kept attacking me even tho I was no where near them or looking at them.
Once I killed the enderdragon, the enderman are still aggroing on me without me looking into their eyes. Sometimes they will randomly teleport near me and then a second later attack me while I am looking at the ground. I've also been attacked from behind when just standing there. It's making searching for the end city and ship nearly impossible.

I don't think this is fixed either. You can suddenly get attacked by an enderman even if you hadn't seen it at all let alone look at it. Very aggressive even on normal.
Ah... fixed in 1.2.6 - not a released version for iOS..
Probably a duplicate of MCPE-28094 & MCPE-27664 (see video)