Can you go to one of these titles and view it’s XML data? Can you copy and paste it here or in a DM to me? I’m suspecting that the ad marker maybe ending at the end of the file or an overlap in ad and credit markers.
IIRC if you’d like to reanalyze the file for ad detection you’ll need to Plex Dance the file. Once the file is readd, ad detection can be ran again. Either manually, automatically when added, or during maintenance depending on your settings.