[4.7.3] Cannot copy Timeline node from class BP to another class BP

[asperatology]

It is happening in my project. This is what I did:

1. Add new timeline node.
2. Double-click on node.
3. Shift-click and add two keys. One key is (0,0), one is (1,1).
4. Save and close timeline editor.
5. Select node.
6. Press CTRL+C.
7. Switch to another class blueprint, empty one.
8. Press CTRL+V.
9. Nothing happens.

Both class blueprints inherit classes that is a subclass of C++ class, AActor.