I was able to find this post and comment (Update scanning an existing beets database) which points out that it is confusing to do an import on the same directory. As in, if my library is ‘/mnt/music’ and I try to import new items from ‘/mnt/music’ then it’s not going to work well.
Is there any settings of the incremental, skip, asis, etc, that would work in this scenario to find new music only and skip everything else? Otherwise I guess I’ll need to reconfigure Lidarr a bit.