We're seeing an increase in 500 errors using the Dropbox API

We're seeing a significant increase in 500 errors using the Dropbox API, and very little indication about what might be going wrong. It appears that our requests are valid, because we can simply reissue the exact same request and it will succeed, whether by using `fetch` in the browser or `curl` on the command line. We've had failures in `copy_v2` and `continue` and I think others, all following this same pattern. I've seen other support requests have included the x-dropbox-request-id, so here are two examples that produced 500 errors: