Right now CONTRIBUTING.md suggests issues start in the iNaturalist forums and that a team member will move to Github if appropriate

This guide is for people who want to help us out by writing code. If, on the other hand, you want to request features, report bugs you've found while using this software, or discuss anything else about iNaturalist, please start by posting in the Forum. We mostly use Github for managing implementation, not for discussing what to implement or why we might want to implement it.

We will probably close pull requests that don't address open issues. Again, if you want to change functionality, the discussion should start in the Forum, and if staff agree something should change, we'll make an issue, label it, and then you can work on it.

Apparently that's appropriate for UI forward issues — that is, bugs found by using the app or website — but not for more technical code forward problems. Figure out what current practice actually is, what belongs where, and update the docs to match.