Enderdragon doesn´t attack player

THIS IS FOR 1.15.2 Not 1.6(I cant choose them)

 

The enderdragon does`t attack me or go to the portal(that go to the overworld) after waiting more than one hour, rejoining and hit him doesn`t make anything better (If you doesn`t have read the Environment until now I want to remember that this is an Server with CraftBukkit version git-Bukkit-8160e29 (1.15.2) (Implementing API version 1.15.2+-R0.1-SNAPSHOT)). 

 

PS: i don`t know if his is an bug, but when I want to fly to him to dealing damage without and with an weapon he won`t be hitted.