Pretty much how it looks when I don't drive it for a few days
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You have a slow air leak somewhere. The LR3 wakes up every few hours and relevels the truck by letting air out of the corners that are higher than the leaking one.
If you dont fix it soon, the aircompressor will wear out in a few months and be a much bigger repair bill.
Spray bottle of very soappy water is good for finding leaks, but often these are in the front and rear valve blocks.
You can start/repressurize system, then shutoff engine and pull a couple fuses or leave a door cracked open overnight and see if the front, rear, or a single corner drops.
Sorry, I forget which fuses but im sure you can search it.
Id start with replacing those vavle blocks if they havnt already withing the last 60k miles.
ALSO, i suspect the vavle blocks chronically get clogged with dessicant dust. The dessicant air dryer pellet cannister is attached to the compressor and vibrated into fine powder. Replace those little bead and clean out the canister too. IF you want to drive this LR3 "forever" Id find a way to move/mount the dryer canister off the compressor.