This was fixed:
Go to http://en.m.wikipedia.beta.wmflabs.org/wiki/Special:Gather/all/recent I've populated the wiki with "active" collections so that we could test the infinite scrolling (which we are going to hit in production for sure) Scroll to the bottom and you will see that loading collections failed. This is most probably because https://github.com/wikimedia/mediawiki-extensions-Gather/blob/master/resources/ext.gather.collections.list/CollectionsList.js#L105` there the collection type was renamed to 'recent' and not 'active' as you can see in the code.
Now it is broken if you do the same thing but as an anonymous user.
- As an anonymous user, go to http://en.m.wikipedia.beta.wmflabs.org/wiki/Special:Gather/all/recent
- Scroll down, pagination is broken.
See comment for what to do: