Music stutters at LOADING RIVERS

The theme music stutters while LOADING RIVERS, but then it continues on as normal when the rivers are done loading.

Is there a place to report bugs like this? Or is this forum the right place?

This is only a recent issue, if you could even call it that as there is no impact that I can see. They probably just need to tweak something in the load list and likely to be fixed by the next update run.