The "Convert Selected Components to Blueprint Class" causes assets to disappear if the assets had previously been converted to blueprints

When using the "Convert Selected Components to Blueprint Class" feature on an object that has already been converted into a blueprint class the assets then disappear.

1. Open the first person template
2. Select one of the white blocks in the level
3. Alt+Drag to duplicate the object
4. Select both blocks
5. Convert the Selected Components to blueprint class (This can be found in the blueprints drop down)
6. Close the Blueprint window that pops up
7. Select the new blueprint from the content browser and drag a copy into the scene
8. Select both copies of the new blueprint
9. Convert Selected Components to Blueprint Class again
10. Notice that all selected assets disappear

Expected: The feature would create a new blueprint that contains two versions of the previously made blueprint
Result: The selection becomes invisible