Well looks like we are pretty much in the same boat. Idk how many people actually pay attention or care but I have seen many new trucks with the same issue. I did have mine replaced and the new one turned purple too. So like you I’m wondering if it’s a issue with the truck causing this and not the light. Hopefully a tsb will come out on it. Those headlamps are really expensive so I can’t see them continuing to replace them without a more permanent fix. Well good luck with yours, if you do find out any info please lmk.