Adding map elements to a structure does not retain the information after saving and closing the project. This only appears to happen after you add a considerable number of Map containers inside a structure like 4 or more. With few it works fine.

Steps to Reproduce
  1. Create some actors
  2. Create a Struct
  3. In the structure add some map members referring to the actors you created 
  4. Save-All
  5. Close and reopen the project 

Result: Opening the structure again will show the member that uses Map container with broken values like "PLACEHOLDER_CLASS..."

Expected: The Struct to save properly after saving and closing the project.

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Affects Versions4.
CreatedMar 15, 2019
UpdatedMar 18, 2019