I have a night time forest scene using the HDRP pipeline and my character has a flashlight. For some reason though if they player highlights the tree with the flashlight, the tree gets slightly tinted pink. The trees are from the Unity HDRP demo asset pack, and the character controller is from the Suburb Neighborhood house asset pack. Is there a reason it is doing this? (2nd image it is with the flashlight highlighting it, 1st is trees in normal light)
This is usually caused by not setting up the diffusion profiles correctly. Please check your diffusion profiles especially on your trees leaf and branch materials.
i.e. click on your tree and expand all materals one by one and see which one actually requires & uses diffusion profile, you might see a button named FIX next to the profile assigned in the slot.