Also, based on your screenshot, if that url is accurate, that should be a 404.
There are two endpoints here related to organizations. There’s organization list, which is sorta what you have here, but it’s missing a tailing slash. But without this trailing slash, it’ll be a 404. This organization list endpoint wouldn’t be spitting back this onboarding tasks either which is what you’ve shown pasted in here.
And an organization detail endpoint would include this information. But a single organization can only, in theory, have a max of 9 values here. So it seems unlikely that this could somehow expand into 20MB of data from only 9 items.
So getting access to the full payload here would be useful. Looking at a few of these samples from production data, verifies my assumptions. I’m not sure if there’s something else at play that is causing this behavior to be broken possibly for on-premise users.