It won't matter in six months time. This course is being sunsetted. If you make it through to a badge, then be happy. There is no point reporting bugs. As far as I can see, this module is capable of letting all the correct code pass, but may take some page refreshes in the process.
When you get to the lessons involving loops, disable the auto-refresh by raising a parsing error at the top of your code.
<?php else ?>
will do it, but then so will any other nonsense. Start each lesson with just such a bug. Then code till you heart pleases, and when ready to submit, remove the bug.