Wondering if there is an update. I am getting the same issue on a UM2 Clone I built Running the latest version of the Marlin Firmware. Printer prints fine once I ballparked the Bed Leveling. all axis move in the correct directions, it homes fine and prints fine but when I try to run the bed leveling routine it goes to the front center first. I have been all thru the firmware and have yet to find that routine. Please don't beat me up for building a clone, I have another cheaper printer and I could not afford the up front price. However I did use an Ultiboard 2.1.4, I opted for direct Drive with both X/Y on the Back Left corner. I did have to invert one stepper.