Crash when removing text from volta line

Steps:
1- create a new score;
2- drag-and-drop a volta line to the score (e.g. "prima volta");
3- right-click on the line -> Line Properties...
4- delete the content of the "text" box in the "Begin" field;
5- press Ok -> crash (if the line is selected)
6- if the volta line is not selected, select it -> crash

Notes:
The accessible plugin is accessing the text element of the volta line to display it in the status bar, determining a crash since this text object was probably deleted at step 4.
If the same steps are performed, but by selecting Volta Properties... at step 3, there is no crash.

GIT commit: 24facb5 Windows 8.1