M117 ASV has weird fuel behaviour

Sometimes it drops fuel, doing repair doesnt fix it. Doing setDamage 0 doesnt fix it (Checked getAllHitPointsDamage, still broken) Doing setFuel 1 restores fuel but after about 5 seconds it drops to 10% again and then 10 seconds later it's empty . AllVariables doesn't show anything that would explain it.

tl;dr WTF