Problems with quiz check answer

Hello. I’m having trouble with the check answer feature on LearnPress’ quizzes. I have two problems:
1. In chrome, the check-answer button works OK (though takes a bit to load the answer), but with Internet Explorer or Microsoft Edge browsers, the answer does not show when the button is clicked.
2. For quiz questions created with the sorting choice plugin, the answer is always displayed below the question regardless of whether the check answer button has been clicked.
I upgraded LearnPress and the sorting choice question plugin this morning and am still having the problem.

Any thoughts/help would be appreciated.

Cheers!