This is a maddening issue. I use my SP3 for work, and cannot be in a meeting and have all my notes disappear. I've gone back to 8.1. I hope they fix this soon..... all my ipad "friends" are laughing at me!
A huge chunk of my notes just disappeared. It's strange because it wasn't in the same "pattern" as my original post shows. It was like someone took two large boxes, crossed them (in the shape of a sideways "T" intersection) and deleted the chunk of my data.
Some parts that I wrote earlier got erased, other parts where I wrote later got erased so it wasn't like it only erased my last written notes.
I just thought I'd mention something g regarding the dussapearing inking.
Dint be so quick to revert to 8.1 if this is a problem for you. Somehow with O16 Microsoft have now brought this issue across to 8.1. A colleague is now stuck having to use the MUI version of OneNote on 8.1 because if this.
I am running Office 365 on Win 10; ever since the upgrade to Office 2016 I have experienced the same "disappearing ink" issue in OneNote 2016 described above. The workaround I use is to disenable the handwriting recognition in OneNote.
This should be a stunning embarrassment to the OneNote development team.