Query Problem on qa.debian.org

Dear Debian QA team,

I have met a query problem recently when querying a debian/ubuntu package on qa.debian.org.
I could query both debian and ubuntu package if I set the category to be "all". It would return all versions in both debian and ubuntu systems.
But now setting category to "all" returns nothing. I have to query "debian" and then "ubuntu" to get all possible results.

Is there something wrong or is it a designed behavior?

Please help to take a look and I would really appreciate of your reply.

Thank you and best regards,
Guangyu