When attempting to get data from the API server it's very hit or miss. Sometimes requests will be responded to as expected, other times the server will not respond. Both scenarios can happen back-to-back. If there's a pattern I couldn't detect one. I'm afraid I'm an end-user, not a developer, so I'm not sure what exactly is going on under the hood.
Last time there was a problem the devs weren't aware of it until someone tweeted them, so if you're able to tweet them please do so.