I solved and forgot it couple times already and probably I need to make this blog post to remind myself.

From time to time my clipboard between host (Debian 8.1) and VM (Windows 7) stops working. There is lot of solutions which work for some. But my issue is slightly different, my clipboard doesn't work on rich text. I just have to pass it through notepad to have plain text and then miracle.... it works. It's simple and trivial and yet I forgot about it couple times.