Strangely, the remotely hosted API does not return the comment content, as discovered by Alberto here.
This problem is in fact on the API side. On my local setup (API and dashboard running locally, Neo4j database remotely), this works as expected and comment content shows up. However, if I run the dashboard locally but connect it to the remote API, I can replicate the problem. For some reason, the remote instance of the API has a problem that does not show up on my local version. I'll have to dig into it later, but might not have time before Tunisia.