I can't talk about the Anthem but with my Dutch Star when I back up the tag does not raise into the air. It just takes the pressure off the tires. So you are most likely operating the way it's supposed to.
Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS