We have a .net core azure function on function runtime 3. This works perfectly fine ran locally and most of the time on our deployed app service. However we've experienced intermittent 404 responses for requests that go through perfectly fine at other times.
There's no entries appearing in our logs or application insights telemetry for the failing requests.
It feels a lot like this issue on the azure-function-host github project: https://github.com/Azure/azure-functions-host/issues/5247 though that's targeting functions runtime 1 or 2.
Has anyone had similar issues or know of any way to get additional log info that might highlight what problem we're running into.