That bug should probably be closed, because the person who published the PPA uploaded a version to Debian just a month later [1]. From the package's tracker pag

That bug should probably be closed, because the person who published the PPA uploaded a version to Debian just a month later [1]. From the package's tracker page [2], you can see that the same person became a co-maintainer, and has been preparing most of the uploads ever since. [1] https://tracker.debian.org/news/180171 https://tracker.debian.org/news/180171 [2] https://tracker.debian.org/pkg/lyx https://tracker.debian.org/pkg/lyx