It can be weird to see it go up (and also alarming to see it drop suddenly if you're in mountains, winds, deep sand, or the like), but the Distance to Empty (DTE) feature does fluctuate. It's evaluating recent driving style and conditions, like speed, acceleration, terrain, etc., and estimating how far you could drive if those conditions stay in place.
Letting up on the accelerator or pressing it more smoothly instead of stabbing it, going down a mountain, tailwinds, that kind of stuff, could have your DTE going back up.
2021 Oxford White 2-door non-Sas Mid package 2.7L/10-speed Badlands with MIC top
2021 Carbonized Gray 2-door Sas High package 2.7L/10-speed Badlands with MIC top
Keeping the Jeeps: stock '89 XJ, 3.5" lifted '00 XJ on 31s and '89 MJ