Shaper Origin Spindle Misaligned

Recently my workshop's Shaper spindle has stopped rotating. I've narrowed it down to the spindle having been essentially shoved back into the body of the motor, which means when fully tightened down, the collet nut rubs against the housing and prevents it from moving. It's likely related to issues I was having with the z-touch function immediately prior to it not working, in that the spindle would come down to touch off, make contact with the surface, and prompt me to try z-touch again.
Is there any repair we can make to the spindle to re-seat it in its proper position, or will we have to send into Shaper for repairs? If anyone else has experience this issue in the past, what can be done to prevent it going forward?