No, I’m the one who was mistaken.
Have you coded the quality settings via a blueprint so that when the game is packaged, those settings are applied?
You may need to do this to force the correct amount of streaming. Check your scalability settings, and apply them in an active blueprint.
Or you can permanently increase the POOL SIZE:
I had this identical issue, but mine was in the editor, so I imagine your issue is because the editor settings are not being carried over in-game (after being packaged).
EDIT:
Just saw the “Standalone Game” video you posted. I thought you meant PACKAGED game. Try packaging the game and see what happens.