RSS Feed posts replaced with comments

Hi, My rss category feeds are displaying comments, instead of posts. I installed the Login Redirect Plugin today, and since discovering have deleted, but the issue still exists. On a staging site I have disabled all plugins and changed theme to twentyseventeen, but the issue still exists!

https://insights.ehotelier.com/insights/feed/ - not working

https://insights.ehotelier.com/feed/ - working

https://insights-ehotelier-com.ehotelierms.staging.wpengine.com/education/feed/ - not working

https://insights-ehotelier-com.ehotelierms.staging.wpengine.com/feed/ - working

Really appreciate your advice!

Thanks
Matt