Re-importing animations from .fbx created in blender stops animation from correctly animating

Re-importing animations from .fbx created in blender stops animation from correctly animating.

1. Download and unzip attached .zip file (contains .blend and .fbx)
2. Open editor (any project)
3. Press Import
4. Select .fbx from .zip file
5. Ensure "Import Animations" is selected on import menu and press import all
6. Select any of the imported animations>Open in Animation Editor
7. RMB the selected animation in content browser>Reimport

Results:

In the animation editor window, the animation stops moving entirely.

Expected:

The animation is reimported and continues animating in the animation editor window.

Blender FBX Export -> UE4 Re-Import Problem