Sorry for the late answer. There is a hard excluded (in code) for /run. With the newest version this hard exclude can be overriden by explicitly adding a directory to backup below the excluded folder, e.g. /run/user.
Sorry for the late answer. There is a hard excluded (in code) for /run. With the newest version this hard exclude can be overriden by explicitly adding a directory to backup below the excluded folder, e.g. /run/user.