here we can see the setup of the zone as the offense reaches the endzone. The zone almost naturally forms a circle around the stack.
The front of stack cuts. Notice how the D does not follow it but more so the wing. This is because the D cannot leave this front of stack position. The short deep comes down a bit to help on this side whilst the D tightens up to the next man.
As the player clears, the short deep (6) will float out to take it whilst the wing (4) will come back to follow the next cut.
Dump defense can be more honest here as you are playing 2v2