the bond market usually works in cascades of transactions trading between the various durations of notes.  when there is an inversion it's like a wall or ditch that impedes transactions between the notes on either side.  this prevents price discovery.  as soon as the inversion is resolved everything is traded as normal and the real values are found.  the problem is all these assets are inflated with nothing backing up the price but printed money from the fed which is now almost all gone.  voila, a crash.
United States