Autoscan not deleting whole series from plex when deleted from sonarr

[kevindd992002]

So I have autoscan setup for my radarr and sonarr instances. Everything works fine for radarr (both download and delete events get sent to my plex server properly). However, for sonarr only the download events seem to work. For a "series delete" event, I see the POST event log in autoscan but the series is not deleted in plex for some reason. Here's the whole autoscan log for the handmaid's tale:

Dec 19 17:28:23 INF Scan moved to processor event=SeriesDelete id=ceg2tdp5b9vs6ink8gm0 method=POST path="/data/media/tv-hd/The Handmaid's Tale (2017)" url=/triggers/sonarr-hd
Dec 19 17:28:32 INF Scan moved to processor event=SeriesDelete id=ceg2tg15b9vs6ink8gmg method=POST path="/data/media/tv-uhd/The Handmaid's Tale (2017)" url=/triggers/sonarr-uhd
Dec 19 17:31:04 INF Scan moved to target library="TV Shows" path="/mnt/data/media/tv-uhd/The Handmaid's Tale (2017)" target=plex url=http://plex.home.arpa:32400/
Dec 19 17:31:19 INF Scan moved to target library="TV Shows" path="/mnt/data/media/tv-hd/The Handmaid's Tale (2017)" target=plex url=http://plex.home.arpa:32400/

And as you can see here, all the episodes are still in plex:

What am I missing here?

[kevindd992002]

Here's the plex logs for that event: https://gist.github.com/kevindd992002/d2bfe87455ee5bcb77c66a580aa4d40f