I haven’t attempted to redo the documents yet as I was hoping for a way to restore the links.
I’ll work through getting a couple back in this morning between my regular work and see if I can replicate the problem.
There were no other documents open at the time so I do wonder if it was an access issue.
I have full admin rights to the model and the database it is stored in so unlikely to be a permission issue, wonder if it could be something to do with access to the shared drive where the documents are stored momentarily dropping.
Will see what happens and get back to you.