At version 21.1.11-1 xorg doesn't start, complaining about not being able to find /usr/lib/Xorg.
Workaround: downgrade xorg-server-common-rootless and xorg-server-rootless to 21.1.10-1.
In the previous version /usr/bin/Xorg is a binary, but in the new version it is a script that tries to run /usr/lib/Xorg, which the new package doesn't provide.
We also seem to have a problem with the .INSTALL script ("line 9: unexpected token near }" or something like that) in both versions, though that does not prevent xorg from installing and working normally.