I saw this has been brought up here but the topic was closed before I could see any answers.
I have a brand new lens and I am installing it into the head correctly, but once I start a print, it comes loose and moves halfway down the printer head.
Has anyone had this happen, and if so, were you able to find a quick solution?
Is there a magnet stuck to it? If so, that’s the magnet that’s supposed to hold it in place. In that case it could be very carefully glued back on its seat in the head.