Click on the player dismissed and change the batter
This will then default onto a run out
Enter the fielder
Un-tick the end ball box
Select the amount of runs
Continue with the match.
Select non-striker as ‘Player Dismissed’
Choose ‘Run Out Backing Up (No Ball Bowled)’
You will see that no extra ball is added, and that the wicket is attributed to the previous delivery in the ball by ball report.