Why did the JSON:API module start returning big arrays when CREATING?

This is kind of strange. I think the problem is caused by using the full domain name instead of the IP address in the URL. In other words:

http://domain.name/jsonapi/node/contentType

behaves differently than

http://IP.ADD.RE.SS/jsonapi/node/contentType

In the past, I was just using the IP address in the URL because I was building out the site. Last week, I turned off this configuration in the NGINX front end and started using only the full domain name. So literally the only change I made in my code was switching the URL.

When I turn back on that configuration file in NGINX and then use the IP address in the URL, I get the old format response from POSTing a new piece of content. The JSON has field right where I expected them.

Is there something that could be causing this?

TIA!

There might be some redirect happening in your application? Can you see if you are being redirected perhaps?

Thanks. That could be.

Is there some place I should check? The NGINX configuration files?

Or is this deeper in the network?

I would first look at console. Also you could look at the nginx log.