What happens if you change the checkboxes? (instead of modifying the raw text)
Thats exacly the problem:
When you make changes "inline" (respectively "...raw text)") it works - is saved.
When you use the "graphical" function it does not work (as described above)
Must habe been more specific:
In my case thet change I mentionied is the time value 00:05:30 vs.00:05:45
Please simply try it.
It will be crytalclear immediately.