People have been using Redline for years it was highly recommended way before the internet. If there's an issue under warranty I would not worry about it. Their going to drain the oil into a mixed bin drop the trans pop it open and blame China. I don't think there'll be a lot of forensics with the fluid.
Keep in mind the Royal Purple will hold the purple color for a while as well. That would raise a red flag and oil analysis would be done at that point.