Jetpack has broken rss feeds

Thanks for the report! We had made that change to avoid conflicts with other plugins, as you can see here:
https://github.com/Automattic/jetpack/pull/10061

From your report, it looks like we still have work to do though!

Could you open an issue here and tell us more about your setup, and the different plugins you use on your site and that may add data to RSS feeds?

Once we can reproduce the error we should be able to come up with a fix.

Until then, you can add the following to a functionality plugin on your site to deactivate the Geo Location feature in Jetpack:

add_filter( 'jetpack_tools_to_include', function( $tools ) {
	return array_diff( $tools, array( 'geo-location.php' ) );
} );

Thank you.