I see what’s happening.
All that text is in the <description> tag in our original RSS feed.
When feedburner re-renders the feed it’s creating an <itunes:subtitle> and <itunes:summary> tag. It copies that full text into both tags. So then Overcast renders them that way.
I can probably stop it from doing that by including both of those tags myself, with some appropriate content so they don’t get auto-generated.
That said, all the other podcast apps I’m trying are rendering it correctly, including the much maligned official Apple one.
No, it does not explain that. But if you inspect the source of the RSS feeds, I just don’t see any other explanation. The only time the text is repeated is in those additional tags. And when it is repeated in those tags, it is repeated with the HTML and formatting stripped out, which is exactly what you are seeing there.
Yeah, I don’t see any differences comparing the last 2 episodes in the original feed, or in feedburner. Maybe a length thing? The subtitle for the 2 bad episodes is shorter than the one for Layoffs. Does seem like an Overcast deal.