Ask HN: What are the biggest API development issues that you face?

Some issues that I face are : 1. Deciding on a common API structure amongst teams. 2. Keeping up to date with the changing API structures. 3. Suggesting modifications to an existing API. 4. Waiting for backend developers to finish APIs before getting started. 5. Notifying co-workers of deprecations/breaking changes. If yes then How do you tackle these issues in your current work?