This is a classic problem with having only 1 end switch per axis. The software needs to raise the nozzle off of the bed before it tries to home X & Y. Otherwise, if the nozzle is touching or pressing against the bed, something is going to get damaged. But because there are not end switches on both sides of the axis the machine has to make an assumption that it is OK to raise the nozzle.
You have a couple of options. You can add a Z-Max end stop so the machine knows where the end of travel is on that side of the axis. Or, you could leave the machine with enough room to perform its cautionary nozzle raise when it powers up. Or, you could set the Z-HEIGHT-For-HOMING to 0.00 if you know you won't leave the nozzle pressed against the bed.
You have a couple of options. You can add a Z-Max end stop so the machine knows where the end of travel is on that side of the axis. Or, you could leave the machine with enough room to perform its cautionary nozzle raise when it powers up. Or, you could set the Z-HEIGHT-For-HOMING to 0.00 if you know you won't leave the nozzle pressed against the bed.