That’d be due to the single error in the logs. Looks like something with the metadata for that series is incorrect (multiple files with the same path), which prevented the metadata from finishing processing. Running the housekeeping task then refreshing the series should clear it up.
Did you manually import the files tot eh series folder outside of Sonarr or did you using Manual Import from Wanted: Missing?
But after examining the logs more closely, the log shows the error happens after it tries to scan Season 8 episode 18.
I only replaced Season 9 so that was weird. Went to check Season 8 and somehow there were 2 episode 18’s. Looks like when episode 18 720p was replaced with 1080p, the 720p wasn’t deleted.
After deleting the 720p, Season 9 scanned properly