Thank you for sharing your feedback.
We encourage you to have a look at our articles on how to better configure guidelines for Junie.
Please refer to the YouTrack article about the code 400 issue. Regarding the issue with the controllers, it is known to our team, please upvote and follow the YouTrack ticket on Junie not validating all the controllers for updates regarding this issue.
Best Regards,
Oleksandr