That means your x axis isn’t level.
Kind of hard to put into a description. Measure both sides from the same point to the top of the motor mount, make this number as equal as you can. level the bed to this x axis the first time.
What you have going on is your left (motor side) is higher so it is supporting the whole axis and the other side is floating.
Not by very much you are close, this is just one of those things you only usually figure out after it is really far out of whack.