Submit button has to be clicked twice

Hi, I have had the same issue with a couple of multiple choice interactions on a module that was built by a colleague (just meaning I was trouble shooting without having all the build background). 

There is a submit interaction trigger (matching the multiple choice interaction) yet when you select the incorrect response the incorrect feedback will not display unless you click the submit button again. There were two attempts built in. 

After fiddling around I managed to fix the bug by reducing the number of attempts to 1, then increasing to 2 again at which point a Try Again slide was generated. It seem the double click submit must be where a Try Again slide was supposed to appear. Maybe the Try Again slide had been deleted by the builder (as it is a binary choice it is not really necessary) but the Submit button is still expecting that interaction? 

Hope this helps someone, cheers Lotus