Depends on the Sonarr settings.
Lets try capturing a fresh clean set of logs.
While performing the plex dance, make sure nothing else is going on.
After emptying the trash, and cleaning bundles> Stop your server, rename your log folder to logs.old (will keep the data intact if we need to go back to it), start the server, add the file back, and perform a library scan. Wait 5 minutes after the scan finishes, and get the clean server logs and post that here with the exact filename.
