UrBackup in unprivileged LXC containers

we encountered a problem with UrBackup in an unprivileged LXC container over BTRFS. From the operating system’s point of view, the entire container runs under a current account and in this case it is not possible to delete the read-only snapshots and therefore the individual backups either. However, if you disable the read-only parameter of the snapshots (for example, using the “btrfs property set -ts ro false” command), to which the regular user has the right, the snapshots are deleted. Would it be possible to add a function to UrBackup that would clear the read-only flag before deleting the snapshot, thus would resolved the problem of deleting backups in unprivileged containers?