(Yeah, I know this is a very late response ...)
The episodes between EP219 and EP224, as well as EP225 and EP226, had blank values for the "Genre" and "Year" tags. I don't know anything about iTunes but I'll guess that, if you fill in those tags, the files will work on your player.
If you use Windows, the
Mp3tag program will do just what you need. (If you use MacOS, I'm clueless.) MP3 tags have been hit-and-miss throughout Escape Pod's run. EP235, EP236, and EP238 have blank "Title" fields. Sometimes "Artist" is the story author, sometimes it's "Escape Pod", sometimes it's "
editor@escapepod.org". I fix all this up before loading it onto my phone (an old Palm Treo) so the MP3 player ap won't have a fit.