On the ground or in flight? Does it straighten up later or only if temps change? On power up or if you were powered up and I turned on the AC and cooled the room off (maybe heated hangar to outside) it would start to lean?
Both on ground and in the air. Running the heat in the plane and landing, the next initial start would have the display showing level. I live in a warm climate so I rarely am in the plane when it is less than 40°F .