All (most) wise people that have written about the usage of resource pool in a master/sub project setup, recommend that the usage of a separat project file with only resources should be initiated and then used as the pool for all projects within a master project.

I am currently playing around with this setup in MS Project 2016, before I do any real project planning...

The setup I am testing is a simple:

Master plan
Resource project (used as resource pool)
-Project1 (Sub-project) <-- I can see resources here
--Task1 <-- I cannot see any resources here (empty list)
--Task2 <-- I cannot see any resources here (empty list)
--Task3 <-- I cannot see any resources here (empty list)
-Project2 (Sub-project) <-- I can see resources here
--Task1 <-- I cannot see any resources here (empty list)
--Task2 <-- I cannot see any resources here (empty list)
--Task3 <-- I cannot see any resources here (empty list)

I have no problems to set this up and I can see the resources from my resource project in my resource list in the master project and on every sub project title row
However, when I try to assign a resource to a specific task the list of resources is empty and the assignment dialog seems to be looking in the resource list of the sub project.

Am I missing some setting here or am I completely off track?

Been looking at this as an example: https://www.youtube.com/watch?v=h1A_Q_oyE6w