RSS feed – not recognizing paragraph breaks

In the last few weeks, my RSS feeds are no longer recognizing paragraph breaks from my posts. Site: unefemme.net

The feed generated from WordPress itself (https://unefemme.net/feed) does, but they are being dropped by an email service that uses the same feed as the “subscribe to posts” feed (https://unefemme.net/feed) and in Feedburner itself. I’ve tried adding </br> tags in posts but they get dropped when I save a draft and exit. I’ve contacted my theme developer who is unable to determine why the paragraph breaks show up in one version of the feed but not another.

I am not proficient in the technical side or with CSS code. I’ve read through the other threads from a few years ago, but did not find a solution for my blog/feed. Thanks in advance for your help!