It's a bug. Filbot should be only looking at the filename not the path to be sent for renaming. In any case it's inconsistent if I rename multiple items in that folder, most but NOT all of them get the path name used for suggestion. Some get the filename looked up. I'm not aware of a use case for us...
Using filebot 4.7.9 on Windows 10 pro, but this occurred in prior versions. MegaDownloader sometimes creates folders using the name of the first file in the download. If you try to rename other files in the folder, Filebot uses the folder name instead of the filename as the rename source. e.g. If I ...