By default a D&D slide is pausing at 1,5 secs. Maybe you should look at this article and download the free pdf I provided:
How and Why Pause Captivate’s Timeline? | eLearning
That pause is linked with the Submit button, not visible in the Timeline, but you can se this in the Actions tab of the D&D panel.

No need to add another pausing point at all. Did you perhaps delete the Submit button ? You can drag it from the stage in the scratch area, replace it by Auto Submit. Check the pausing in Actions tab, please and don't delete the Submit button.
When the Submit button is clicked (or Auto Submit, which is only for correct answers), and the answer is correct, the Success action will be done. When the attempts are limited, the Failure action will be done after the last attempt. Both actions are by default set to Continue, but can be changed of course.
Another reason why the slide is not respecting the pause can be an Object action, where the option 'Continue playing the project' is not unchecked.