Articulate Engage activity in Articulate Storyline not moving to the next slide in the presentation

I created an activity using Articulate Engage for PowerPoint.  I then imported the whole PowerPoint presentation into Storyline.  The Engage activity looks good and operates reasonably well, except that after one clicks through the activity, it will not advance to the next slide in the presentation.  I’ve checked my triggers and everything seems to be set up correctly.  My workaround until I can resolve this was to create a textbox with a trigger that the user must click to move to the next slide.   Do you have any thoughts or suggestions on what might be preventing this Engage slide from moving to the next slide following the completion of the activity?

Thanks very much

Johnna