Thats the only lift I hear complaining about for the 4th gen. Like Mx said, check the front end for worn out parts. I had mine aligned when it was lifted and just did it again before I made a 6k cross country trip a few weeks ago! Only did it because I put 12k on the original alignment and have been hunting every weekend and beating it camping and playing in it since spring
I know thats not much help, but I havent had any alignment issues. Nor have my buddies with lifts. Some have bigger and wider tires than both me and you and have NO issues. Honestly those dune Grapplers are hardly ATs and in that size with that tread depth, you should be far far away from issues. Check that front end and/or contact Zone.