When the Ordo of Paul VI came into existence, it was meant to be flexible, not rigid -- see Pope Francis' constant reminders about this.
I wonder if this is the only time any rubrics are given for what follows immediately after a dismissal...
For those afflicted by scruples, there was a prayer in the old breviary craving pardon for any errors or omissions committed in violation of the obligation.71. Aside from Compline, the Marian Anthemn appointed for the season may be recited together with its Versicle and Response, and the Collect, at the conclusion of any Office.
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