I have this scene with 3Ds Max 2022 using two dome lights. One is a sunset HDRI and the second one is an early-day HDRI. After setting up all the different cameras with the corresponding domelight, Scene manage changes the HDR image on the daytime to use the dusk HDR image. At first, I thought it was my mistake, but after resetting everything correctly and flipping through the different camera views, I noticed it had changed again.
I deleted the Dome light, create a new one, assigned the corresponding HDRI, and then again when changing the view it changes the image inside the dome light.
Your help is appreciated
Could it be that the bitmap that you added is an instance? Have you tried to create a new bitmap and add that to the Scene Manager?