Backward vector is fixed at X=-1, Y=0, Z=0

[snook91 (snook9)]

I found the solution ! Finally, I had to spend 2 hours … ouch ouch ouch

Walking backwards

Hi, Go to the Character Blueprint and adjust the setting below in Class Defaults and Character Movement. You should get the results you’re after. Hope it helps. [291288-charactermovement.jpg] [291287-classdefaults.jpg]

We must uncheck Orient rotation to movement in the Character Movement Component and check Use controller rotation yaw in the Character Class Defaults panel.
Also, I have to make some adjustment in the Right Event : replacing Add Movement Input by Add Controller Yaw Input.

Thanks @JaredTherriault for the help !