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1. Have an asset (B) in /Game/Bar, and a redirector that points to it (A) in /Game/Foo, and have both assets checked in to source control.
2. Connect to source control.
3. Fix up the redirectors on A.
4. Move asset B from /Game/Bar to /Game/Foo
Observed Result: A redirector is created in /Game/Bar, but the moved asset in /Game/Foo is marked for delete. After moving the asset, a dialog stating "The following assets are writable on disk but cannot be checked out from source control" is shown for /Game/Foo/A.
Expected Result: No error is shown and the moved asset is not marked for delete.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-39931 in the post.