Empty Collections in Feed

I assume this is a bug, but has been going on forever. When someone I follow creates a new collection it shows in my feed, but I keep getting empty collections showing.

I’ve tried at various times but I can’t seem to create a collection without placing a model in it first - so I assume these apparently empty collections must contain private models (that I can’t see). When I go to the particular users collections through their page/profile the empty collections are not there.

When there are one or two empty collections I hardly notice it, but there are currently ten in my feed.

(edited to include screenshot)

Same here what is this?