RSS feeds description is not pulling the summery field on Blog post

RSS feeds description is not pulling the summery field on Blog post

Hi, I am using RSS feed in zoho campaigns but i have hit a little problem with zoho sites. The description tag in the zoho site RSS field is taking the first sentence of the blog post rather than looking at the summary field on the blog post.

I would expect the feed to use the below field but see below its actually taking the first sentence and cutting it off.??

Can you tell me if this can be edited, seems weird that you would have a summery field and not use it on the RSS feed