Problem description: 
LibreOffice Draw reverts fonts to Times New Roman of its own accord. It then crashes when trying to undo these changes.


Steps to reproduce:
1. Change the default style in Styles and Formatting to use an exotic font.
2. Draw a complex diagram with text-in-objects, text boxes and embedded images. 
3. Carry on adding items to the document. At some point, usually when nudging an image around, all your text in text boxes will change font to Times New Roman, or some other shitty default font. Text-in-boxes seems unaffected.
4. Try to reverse the changes with Ctrl+z.Then try to reverse them by clicking on the Undo toolbar button's drop down. LibreOffice Draw will crash with data loss.

Current behavior:
- Random unsolicited changes of font fucking up my hard work, which are impossible to undo, and attempting to undo them causes crash and data loss.

Expected behavior:
- The fonts remain in the same font-family, colour, etc that I set them at.
- LibreOffice Draw doesn't crash.


LibreOffice... proving that there really is something shitter than Microsoft Office.
              
Operating System: Ubuntu
Version: 4.2.5.2 release