Just tried doing a Debian Bullseye XWiki LTS 14.10.18 upgrade to 14.10.19 and it reported “Inrelease”, thus nothing downloaded to be change or upgraded.
I’m pretty sure I did force the rebuild of the Debian repository index as part of the 14.10.19 release, but even if I had skipped this step, the index is supposed to be rebuilt automatically each day, and a couple of days have passed since the release. @tmortagne do you know what could be wrong?