New music scanner - high 100% cpu on half number of cpu cores

fyi: logs from a rare moment during the perma-scan when the app actually responded.
Plex Media Server Logs_2019-10-14_20-13-05.zip (12.1 MB)

To my knowledge, I do not have folders with more than ~200 files in the library. However, I do have a lot of obscure niche music… 250k files in 35.5k folders.

Currently updating to 1.18.0.1944… hope that helps