I had a fun one yesterday. The `mcp-atlassian` server failed trying to create multiple Jira tickets. The error response (and error logs) was just a series of newlines (one for each ticket we wanted to create). Turned out the issue was the LLM decided to mis-capitalize the project code. My best guess is it read the product name, which has the same letters but not fully uppercase, and used that instead of the Jira project code which was also provided in the context.