Missing POST Data
Providers will sometimes send data via the POST method, typically when a lot of data should be sent at once. In some cases, your browser will prevent Omnibug from seeing the POST data of a request. This is especially prevalent for Chromium-based browsers when a ping or beacon request is made.
Unfortunately, this is out of Omnibug's control. There is an open Omnibug ticket where we will continue to provide updates as the Chromium team looks into this issue or as we find workarounds.