I’m also getting the same error after upgrading to 4.16, although in the shipping build strangely it was the one a few lines down (“No outstanding IO, no nodes in the queue, yet we still have ‘PackagesWithNodes’ in the graph.”) rather than the AddedNodes one, but in a DebugGame package it is the same as you. Attaching my stack trace for debug game package. I’ve just got setup so I can recreate the problem while debugging in VS, any pointers of how to find the problem? Thanks!