A family of Microsoft products that enable users to capture, organize, and reuse notes electronically.
I have the same issue with the disappearing ink (one note 2013 on Surface pro 3 build 9926). There is another thread on the feedback forums here discussing the same issue. Lots of people having this issue and it makes life REALLY difficult if you're trying to take notes in lecture.
In my experience and as is noted in the other forum post I mentioned above, I don't think the syncing is an issue. Ink still disappears if you disable sync for the notebooks. If there's anything I can provide to help fix this bug let me know because it's the one bug in Windows 10 preview that makes life really hard. Also any updates on the current status of the problem would be appreciated.