I remember this “cadence“ on the final melody note: a trombone solo Speak, my Lord arranged by Eric Leidzen.
Instead of remaining on the tonic or a plagal cadence he is passing from Bb to F7 Eb9 Ab7 Db9 Gb7 Cb9 -> Bb.
This is fully identical with the final chord progression of the take 6 song.
Actually this is the answer to the question of ketchup:
Compare with this: He never sleeps (Take 6)
Maybe this is a special feature of Gospelsongs, I wonder if this passage (ending) has a special name like fifth fall sequence e.g. circle of fifths cadence or extended cadence because this is I - IV .... V (TS) = Bb - Eb7 .... Cb7 - Bb (final 4 measures).
Maybe someone could also tell us which composer (or when?) this technique used the first time. Maybe Gershwin?
For me this is the Erik Leidzen cadence. Other ideas?