Flow's EventLogging, or at least FlowReplies, is not working in production. There is no console error, but it's not sending the network request. Maybe related to our editor refactoring.
If we don't want this, we should take it out.
If we keep it, we should bring it up to date and check all the paths (both implementation and schema, e.g. 'preview' and 'keep-editing') (or remove them from the schema).
We decided not to re-implement this, so if we want this data again, we will have to re-implement the instrumentation.