Endermen are becoming hostile when hit by ender dragon. I'm not sure if they are hostile only when hit by ender dragon or if they are hostile when taking damage by anything else. I died several times in End because of this bug. The ender dragon simply hits few endermen and they all start attacking me. Please, if it's a bug, fix it.

I'm sorry if this bug was already reported, I din't find any report for this bug.