Y-axis steps incorrectly during auto level

Hi,

I am using a Lulzbot Tax 6 running the latest software provided by the company and recently have been experiencing an issue when the printer starts to print from astroprint in the bed leveling phase. It completes the homing and tip cleaning as it should and it can reaches and detects the 1st and second auto level sensors just fine, but when it moves in the y-axis to the third sensor it stops about 30-50 mm short of the sensor and fails to make it through the auto leveling phase. Any advise or anyone have this similar issue?