Hello,
This bug is still here in 4.11.0. It’s really annoying for our game and level designers. , I have been able reproduced the bug in a new project which I’m uploading to my dropbox now with instructions inside the map and blueprint files. I’ll PM you in the forums.
For brevity sake:
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Make a blueprint and add a variable (I used a static mesh and turned it into an array).
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Make that variable public.
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connect it through a for each to to a print node on either begin play or a key. → Compile
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make a child of this blueprint and put it into the world.
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Add array elements to the child variable in the world.
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Select static meshes in the world to fill the element slot/s.
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play the game. → when it prints it will show what in the array.
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Exit game. Open up parent blueprint.
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Change the variable’s name. → compile
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Play game
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Print → The child array is empty…
I hope this helps. 