The story usually told is about goods. Money expanded, cheap imports arrived, the consumer price index stayed quiet, and policy stayed loose because the index said it could. That is the first loop and it is real.
The second loop is the one that goes missing. The dollars paid for those goods did not stay abroad. They came back and bought government bonds, which held long term interest rates down, which made deficits cheap to run, which financed more buying. One country was absorbing the monetary expansion on the goods side and financing it on the bond side at the same time.
That matters because the two loops fail for different reasons and people therefore treat the failures as unrelated news. They are not unrelated. They are the same absorber withdrawing from two circuits.