You did all the hard work of contextualising problems in light of the user and their constraints, and then all thought of the user got eroded away as you went over the problem again and again
Disproof
A final draft that still has a notion of the user
Consequences
See most of section 1
Causes
Problem refinement is a noisy, multilateral process that takes place linearly in time. Old information gets buried by new information by virtue of the brain literally not being good at keeping everything in mind at the same time
Focus loss is multiplied when: multiple people are performing refinement, if discussions are non-threaded and not organised, if planning documentation is nonexistent or constantly revised over
Approaches
Your choice of information technology necessarily shapes how you see the world: conversations and narratives bias towards most recent information, canvases let you see everything in one glance and give it equal weight
Whilst this is a blindingly obvious thing to avoid, sometimes it gets lost in the wash