I already reported this bug but a mod didn't understand me and he thought i was asking for a feature, so I made a video so there are no more confuses.
https://www.youtube.com/watch?v=bdgurDsQsE8
You can see that the Skeleton atacks me and we are in the same team.
Duplicates MC-88001 please write it there if you think the moderator did a wrong decission ( ⚠️ remember moderators are also humans and might make mistakes 😉 )