I was trying for several hours to see what mistake I have made but I cannot find anything :C My nested collections shows all elements instead of only those which are connected through multi-reference field. I think I did everything like in docs
Hey @mateusz828! I have answered your question on the other thread, we can continue the chat here if you need to 
Here: Nested Collections do not work - even on a replicated site of a clonable - #4 by Support-Luis