Unity will constently improting(iteration) all the prefab after saving scene, But I don’t change any prefab just save my scene.
Please see the attached files. The save processing need almost 2 min ,so I have to save a lot change together…
We found this is because the “ISerializationCallbackReceiver” ,this interface is called many times after saving scene.
I have a new detail about this bug.
After we switch on “Preferences->General->Verify Saving Assets” , we found the prefabs which contain the “nodecanvas assets” are marked as changed object appear in the “Save Assets List” , but we don’t change any of them.
Please see the gif in the attachment. I don’t change object in the scene but these prefabs are in the “Save Assets List”… After I saving them , I click the “File->Save” again , all the prefabs which I don’t change are still in the “Save Assets List”.
Thank you for your help.
We are attacked by all the designer in our company , it’s terrible. 
Could you please submit a bug report for this issue? Ideally with a reproduction project.
Any update on this? It’s a real problem for our team, and is hurting our productivity.
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Hello, does someone found a solution … ? I loose 10min each time i save a scene… This is extremely annoying 
Still facing this issue in 2022. Did anyone find any solutions?