Code Folding deleted after saving

First of not sure if this is the right section to post this. So if this is posted at the wrong place please move it.

For quite a while now I had problems with Code Folding with Unitys integrated MonoDevelop.
The second I press the save button all the folded code gets unfolded and I have to fold every function again every time I save my scripts. This gets extremely annoying with very long scripts. I have been barring with it for a few weeks now. But it´s driving me mad.

Is there any way to fix this?
I am currently using Unity 4.6.0b17 and the integrated MonoDevelop version 4.0.1.
However I have encountered this bug since Unity 4.3 and even with upgrading Unity it did not disappear.

 

Yes! I cannot understand, it very old and very annoying bug, and there is no information about it, only couple of threads without answers, it is impossible that no one has not encounter with it.