WordSearch Timer - first time only?

We have H5P installed on a Drupal 8 site. 

One of the first puzzles we have implemented is the word search. It works swimmingly except that the timer only works the first time the page is loaded. I do not notice a related error in my Chrome or Safari console. (I am on OSX, latest.)

The current test page is at: https://h5p-kids1.pantheonsite.io/activities/word-safari

The H5P version is 8.x-1.0-rc17

Any assistance would be greatly appreciated!