Hello, you've probably been sent here because you've found an issue in your usage of PostGraphile. I (Benjie) deal with a lot of support requests that have insufficient information for me to diagnose the problem, so I'll ask for a minimal reproduction. Making a minimal reproduction allows me to diagnose (and potentially fix!) the issue much more easily, and is also a valuable exercise for you during your debugging - who knows, maybe whilst attempting to create the reproduction you'll figure out what went wrong and fix your own issue?
To use this, please download the script locally, and then populate the DATABASE