Cloud Functions and DeviceCheck, not getting response from Apple

Question

I'm testing out DeviceCheck, but I'm occasionally having an issue where I don't receive body, response, or error values from Apple. I'm using request to communicate with them. I've tried using request-promise and switched to api.devicecheck.apple rather than api.development.devicecheck.apple, but neither has any effect. I think it has something to do with how crowded a wifi network is, but if so that sucks because my wifi is great even if crowded. I imagine anyone using the app would very likely have the same issue. Is there anything I can do to get any response at all, even if delayed? Some examples are below:

Normal responses

8:36:28.500 PM
check
IncomingMessage 

8:36:22.101 PM
check
Callback response

8:36:22.101 PM
check
{"bit0":true,"bit1":false,"last_update_time":"2018-09"}

8:36:21.901 PM
check
Callback body:

8:36:20.720 PM
check
Function execution took 14 ms, finished with status: 'ok'

8:36:20.713 PM
check
Function returned undefined, expected Promise or value

8:36:20.706 PM
check
Function execution started

Incomplete responses

4:37:55.435 PM
check
Function execution took 436 ms, finished with status: 'ok'

4:37:55.405 PM
check
Function returned undefined, expected Promise or value

4:37:55.001 PM
check
Function execution started

('check' is the name of the cloud function)

Answer 1

The answer was really simple fortunately, and yeah I wasn't handling the promise properly. For request-promise, just needed to add return before calling it.

My var was:

var rp = require('request-promise');

Instead of only this:

rp(options, callback);

I needed this:

return rp(options, callback);

Thank you guys for your responses :)