Does the CF APO site break the RSS Fedd on Siteground?

Does the CF APO site break the RSS Fedd on Siteground?

My last version did so I disabled it.
Looking for update to fix it.
Thanks

I am not familiar with this.

Nevertheless, may I ask do you get some error for XML parsing, blank line, whitespaces, or how so?

In terms of RSS feed, if using WordPress (CF APO obviously if I am right to guess?), I would rather suspect it’s WordPress or some plugin and you might need some trick like on the link below:

I am using above trick for three of my WordPress websites using Cloudflare (but without the APO), which works fine - without above trick, the RSS is “broken” as you state, which I do not know how is it caused or by what (even with all disabled plugins, it’s broken for theese WP websites).