Are you not receiving any error messages in the Output Log?
Are you sure you don’t have a second instanced level streamed somewhere else in the persistent level?
You could try forcing a garbage collection to see if it triggers then (only after an asset is GC’d then it calls unload)
sorry for the formatting issue, ive uploaded an image now that shows all the assets have been removed from the level but the complete section is just not getting called and i dont know why