What are you basing that measurement on?
No. IMO, you haven't lost any steps. That kind of repeatability is what you might get from a servo turning a ground ballscrew. Perhaps that is your backlash. Not the same as lost steps. Could even be a variance in your limit switch behavior.
Loosing steps would result in a noticeable shift in one or multiple axis, often part way through the cut, caused by a crappy driver, improper mounting, or exceeding the performance of the stepper motor by trying to push it at faster speeds and accelerations than it can handle.