<Please note that this is not a duplicate of MC-3039 because MC-3039 it states that skeletons wont attack you and I am stating that skeletons will attack you but will do so incorrectly>
In creative mode when you attack a skeleton it will charge at you and bump into you (just like a zombie would when you attack it in creative)instead of just simply shooting you with an arrow like it should do.
How to reproduce:
go into creative mode and hit a skeleton. simple
Also note that I have searched for this bug report and the closest I have found to it is MC-3039