Polling during slide presentation

I have a meeting scheduled for Tuesday and plan to use 6 different polls throughout. 

I will be sharing my screen showing a PowerPoint presentation . I have planned to insert a poll , share the results and move on.  

I have run a practice using my general room, I have been able to move forward and show the slides, stop for the poll , and display the results and then resume the slides . However, after a few polls, the screen locks and the poll screen is non responsive. , I can continue to show my PowerPoint on screen share, but when I click the poll button , it takes me back to the frozen screen. 

Is there a work around or Am I doing something wrong. ?