Add new blueprint, make the parent a scene component
Add the component to our new actor
Save everything, there should be no errors at this point
Add a new function to the scene component
Have the actor cal the function in eventTick or anywhere
Change the function, add an argument, return value, anything
Save all and you should now get the error.
EditorErrors:Warning: Warning Can’t save …/…/…/…/…/…/Users/DaveB/Documents/Unreal Projects/CropTesting/Content/Crops/Final/BP_Field.uasset: Graph is linked to external private object (unknown culprit) (unknown property ref)
I was able to reproduce this with an actor in the level, or like here, with none.
If this isn’t an actual bug and me just using things wrong, please feel free to shout at me. If you need any more details, just shout.
Thanks for the additional info. I was able to reproduce the issue on our end and after some further investigation I found it was recently reported. It is logged as JIRA UE-36567. You can follow that link to monitor the progress of the bug on our Public Issue Tracker.
The repro steps on that JIRA differ from yours but I believe the core issue is the same. I also commented on the internal version and referenced your post and repro steps.