[Plugin: RSS No More] Strange ? Character

Thanks for a plugin that provides what should be built-in functionality! ??

For some reason, several of my posts are coming up with a strange ? character right where the article breaks. It’s only on some. Any ideas?

https://feeds.feedburner.com/lightfromtheright
https://lightfromtheright.com/feed/

https://www.ads-software.com/extend/plugins/rss-no-more/