How to scroll down infnite and scrap link profile facebook from group member?

I need to scrap link profile from members group. i just dont understand as description in documentation as long the element is found it will keep scroll. but,opposite its just single time scroll down.

Url: https://www.facebook.com/groups/1421535114773364/members/

Sitemap:
{"_id":"movie","startUrl":["https://www.facebook.com/groups/1421535114773364/members/"],"selectors":[{"id":"link_profile","type":"SelectorLink","parentSelectors":["_root"],"selector":"#u_fetchstream_8_g .fbProfileBrowserListContainer > ul ._60ri a","multiple":true,"delay":0},{"id":"load_more","type":"SelectorElementScroll","parentSelectors":["link_profile"],"selector":"#u_fetchstream_8_g .fbProfileBrowserListContainer > ul","multiple":true,"delay":0}]}

Hi, did you find out how to do it?

i looking for this too