I've identified the file and relevant functions here such that you can look into the code yourself if you believe something is wrong - given that you improve the Concorde, you appear to be quite able to deal with Nasal code, so you can just hop in, follow what the routines do and go looking for bugs.
I've never seen discontinuities in my tests - doesn't mean they're not there, they can have been accidentially introduced, or be triggered by something exotic, but I plainly don't have the time to go looking myself whether I manage to trigger the same situation.