Reimport option overrides animation asset

When an FBX is imported with multiple animations, selecting any animation in the content browser and choosing the Reimport option will replace the selected animation with the first animation from the FBX. If multiple animations are selected at once, all will be replaced in the same manner.

1. Open UE4 Editor (any project)
2. Import attached files into project
   • Ensure checkbox for Import Animations is checked
3. In the content browser, right click "PolyBudgetMan-Master_Anim_Armature_Walking" and choose Reimport

Result:
Animation is changed to the same as PolyBudgetMan-Master_Anim_Armature_Dieing

Expected:
Reimport updates the same animation instance

Why does 'Reimport' always import the first animation clip?