Value of Mass In Kg is multiplying in value when clicked

When changing the value of Mass In Kg for a child of a Skeletal Mesh Actor, the value is getting multiplied with every select, deselect, and enter press on the value. The number the value is multiplied by can vary and appears to be set by the number of physic bodies in the Physics Asset for the Skeletal Mesh.

Tested In:
4.15.3 - CL: 3450819
4.16.2 - CL: 3514769
4.17.P3 - CL: 3552910

1. Create a new project using the third person template
2. Create a new blueprint with the parent class set as SkeletalMeshActor
3. Name this "Test_BP" > Open Test_BP
4. Select the SkeletalMeshComponent and in the details panel set the Skeletal Mesh to SK_Mannequin
5. Under the Physics category check the option for MassInKg
6. set the value to 1 and press Enter
7. press enter 3 more times
   Result: The Value multiplies by 19 every time
   Expected result: The value should be what was typed in the first time