rotating pivot changes normals

[HeavyMetalFox]

Hello,
I have a weird situation when I rotate my pivot, the normals on my mesh are changing, any ideas what's causing this?
https://masterhotmail.tinytake.com/msc/ODE0MzQyN18yMTMzMjAyNg

[Christoph_Schaedl]

Are the normals unlocked?

[HeavyMetalFox]

no they are not