I’m amazed you got their support to respond at all. I’ve tried multiple requests and get crockets.
I too have been having RSS fails since Feb.
Looks like youre right. Yes it happens in other themes too
I paid for generatepress. I am wondering if the theme is causing my rss feed problems.
I have 2 issues.
A recent change has caused the rss feed page to not validate. Line 9 throws an error (its a duped line from #8)
When it was working, there were large spaces is the rss feed between blocks in my blog posts.
Also, the feed is creating huge spacing between blog post paragraphs. I’m guessing the <p></P> paragraph blocking around each line is the issue.