HDRI not rotating for LookDev

Hi Guys, I am trying to set an Hdri setup with the help of HDRIbackdrop. I have set the Hdri in Hdri Backdrop Cubemap. also inside Hdri Backdrop, there is a skylight, In that also I have set the Hdri map. but unfortunately when I am rotating the Hdri Backdrop then the HDRI is neither rotating on Viewport nor in the reflection cube i have placed.

what can be the possible reason…
let me know if you need more info…open for suggestions