Mine is just the opposite. If I start with the nose higher than when it came off the truck, then it levels easily and rarely faults. I've only had the wheels on the low side in the air a couple times. Doesn't happen very often.Are you beginning the Auto Level process nose low? I've found it to work more efficiently without lifting everything excessively.
To add, sometimes it's unavoidable. For instance the site we're in now is 5" low on curb side. All said and done all 3 tires on that side are off the ground but it is level.