Possibly some sort of issue related to SetDefaultSubobjectClass() rather than UMovementComponent specifically. I was able to reproduce in 4.10 release branch and in //UE4/Main with the test project provided.
1) Download and unzip the 'test' project linked to the UDN thread into the //UE4/Main folder.
3) Build the 'test' project and launch the editor, then follow the steps provided in the UDN thread.
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-22703 in the post.