Mailman3 Django admin page on Debian Bookworm is broken

I installed mailman3 on Debian Bookworm. Version information:

• mailman 3.3.8-1 (including mailman3-full and mailman3-web 20200530-2.1)
• python3-django-mailman3 : 1.3.9-1
• python3-mailman-hyperkitty : 1.2.1

When I entered the Django admin page (/mailman3/admin/) , the first level (landing page, showing all the administrative items like Mail domains, Failed tasks, Favorites, ... etc.) is okay. But when I clicked any of these item and entered into the second level, the page was broken. A first-level page covered on top of it and I couldn't see the second level pages and hence could not operate on it.

The screenshots can be found here:

https://nextcloud.slat.org/index.php/s/e5KKEEbqDK6DpiN https://nextcloud.slat.org/index.php/s/nLgMRQ9ACyxCwoc

Such problems does not happen in mailman3 on Bullseye, which the version information is

• mailman3-full 3.3.3-1
• python3-django-mailman3 1.3.5-2
• python3-mailman-hyperkitty 1.1.0-10

I'm not sure if it is a bug of Debian packaging or from upstream.