If you begin a variable name with a space, attempting to copy any instances of that blueprint will prompt an error warning: "Unknown property in <BlueprintName>: <VarName> = <Value>.
Found in 4.9.2 binary. Reproduced in 4.10 Preview 4 and Main CL 2752291.
1. Open the editor
2. Create a new blueprint
3. Create a new variable with a leading space, something like (SPACE)TestVar
4. Add an instance of the blueprint to the level
5. Duplicate the instance
Result: In the output log, notice the warning "Unknown property in <BlueprintName>: <VarName> = <Value>
Expected: Variable would duplicate without issue.
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