Beam placement not copied and crashes when undone

This may be related to #18153: Beam placed in middle between high and low notes causes part of beam to be incorrectly positioned, but since it's about a different result, I decided to create a new issue:

1. load attached file.
2. copy measure 2 and paste into measure 4

Expected result: Measure 4 should now look like measure 2
Actual result: Measure 4 looks like measure 1

3. double-click on beam of first measure and move it to look like measure 2
4. select first note and double-click "no beam" (should look like measure 3 now)
5. press undo

Expected result: measure 1 should look like after step 3.
Actual result: measure 1 looks like in the beginning.

6. press undo -> crash

Using 96d2cb0 on Ubuntu 12.04