Adding a new key to a dataTable deriving from c++ will not be found until the entire project is reloaded.
Download link to test project: https://github.com/sorkNasrk/testbug
Result: The newly added key is unable to be found for the c++ table.
Expected: The new key to be found without having to reload the project.
There's no existing public thread on this issue, so head over to AnswerHub just mention UE-85813 in the post.