If there is a vertical lift, but suppose that the Z switch is already pressed (or lets suppose you have a probe), and there is a little tollerance in that, maybe when pressed it won't let your bed get near to the nozzle.
You could try that:
in jog mode, put the z as near as possible to the nozzle with a fast move (-1), the try to lower by +0.1, and try to raise by -0.1, Z switch/or proximity sensor should be switched off, if not you should avoid Z lift.
If you use autoleveling this is a big issue (only if there is the problem explained above), since the Z axis will lower, but won't raise (until the switch/probe is unactivated) during the print.