Hi Emmanuel, We have bug #1008668 that's causing problems on the Ubuntu side and is also reproducible via the Debian package (essentially, it's the same in both places).
The submitter has provided a debdiff, too: https://bugs.debian.org/cgi-bin/bugreport.cgi?att=1;bug=1008668;filename=tomcat9_9.0.58-1ubuntu1.debdiff;msg=5. I am wondering if you can take a quick look and let me know what you think about it? Is this something that we can adapt to? Or do you have a different approach to the bug? Let me know what you think. TIA. - u