When trying to sort the list of coding challenges by Newest (which the dropdown claims to be the default), they are actually sorted by Latest Activity. This is very clear given challenges are numbered!
Sorting by Highest Score and Latest Activity work as expected (although the dropdown still says sorted by Newest).
I found this error on MS Edge for Business, I have tried updating to the latest version (141.0.3537.57) and the bug persists. The same happens on Google Chrome (version 141.0.7390.55).