Weird bug with charactermovement from engine 4.4 to 4.5

I got a weird bug trying to jump+left or jump+right with my pawn close to a collision object

with pics it will be easier to explain:

The bug:

A working situation:

Any explanation?

Get url image to view in full size or here direct links:

link text
link text
link text

oops :o cant edit to correct my post

Fixed my post here: Unreal Engine 4.5 Released! - Announcements - Unreal Engine Forums

why cant i edit my question on answer hub? :x