The link is how the original Protestants explain it. This beginning paragraph certainly holds true. "The Seventh Day Adventists, Jehovah’s Witnesses, and some evangelical Christians hold to the soul sleep view. Lutherans, Catholics, and most Protestants hold to the soul leaving the body view." I would add that Jews also believe that the soul and the body are separate, and the leaves the body at death.
NO one 'explains' how, if the soul is somewhere OTHER than the grave, the soul RETURNS to be joined with what's left of the dead body and then to RISE FROM THE GRAVE at the Last Trump.