I noticed this even before 2.0 - Every time I'd create a new note and start typing or pasted right way, the content I just put in would disappear due to what looked like a refresh. Now with Doc view, this refresh has been more obvious - the tab or frame itself doesn't seem to refresh - but the title and formatting options and content typing box disappears for a second and when it comes back everything is gone. Sometimes the refresh happens right when I create the note, sometimes after about 2-5 seconds, so when I navigate and come back (while transferring notes from tasks, for example) the content is gone. Happens on the web version - using Chrome, happens on both Mac & Windows