Can’t create issues – JIRA Connect Professional Review

I can’t create a ticket. I fill out all of the required fields, pick my project, pick my issue type, and when I submit it it fails with “400: missing required field” and prompts me once more to pick the issue type. To add insult to injury, it forgets everything I typed in the rest of the ticket!
Review by RedshiftXX on JIRA Connect Professional.