you mean you still get all the db records without any filtering done ?
I tried those mongodb-aleph nodes on my test mongodb and having the query in msg.payload works for me.
Can you put a Debug node and show us the msg coming out of Function 7 ?
Can you double check if your Operation in the node config is set to "find"
Could it be that your NR is set to German language and Find operation shows up as "Finden" .. could that interfere with the Node's logic ?