Yes I noticed that. It would clean itself on the way to work down to zero and by the time I drove 10 miles on the freeway home it was back to 40-50%. I can only assume it was from the type of driving I do. Idling and lots of stop and go.
2018 Ford F-150 King Ranch 3.0L Power Stroke 4x4 | Icon 2.5 Front & 2.0 Rear, Toyo AT II 295/60R20, 3" ProComp Rear Block, S&B Dry CAI, LineX & BakFlip MX4, BuiltRight Seat Release | ForScan Mods: Disable Double Honk, 2x Panic, DPF Full %, Digital Temps Above Gauges, A.S.S Disabled