I can confirm this, the batch render deletes light objects from the LightSelect render elements (it will leave the Include Environment checked or not, though). I was using Max 2018 in this case (as Max 2017 has borked its UI and won't show the Scene States dialog), and the Aug 9th daily build.
- Create simple scene, one CoronaLight, CoronaBitmap with HDRI as Max Environment
- Set up LightMix, and two LightSelect layers (one with the CoronaLight, one with nothing in it but Include Environment checked)
- Saved the Scene State with everything selected as components to save
- Changed the CoronaBitmap to CoronaSky for the Max Enviro
- Saved a new Scene State with everything selected as components to save
- On Batch rendering, I get the two Environment LighSelect cxrs showing correctly (one lit by the Sky, one by the HDRI). I also get the CoronaLight LightSelect files, but both are black. I get both LightMix cxr files, which correctly show illumination from both CoronaLight and Environment, but the cxr has no LightMix ability in the CIE.
- On checking Render Elements after Batch Rendering, the LightMix with the CoronaLight now shows <deleted> where it used to show the CoronaLight