I have enabled UBL in Marlin firmware for my Ender 3 Pro and generated a mesh which probed the whole bed normally as expected. However when I use the menu option to Validate Mesh, the whole test print seems to several inches diagonally away from the 0,0,0 home point (see photo).
I don't know what the cause might be or what information I could usefully provide to solve the problem, but here is my configuration.h: https://pastebin.com/yZkWcMki