There is a bug in MaxNote wherein it randomly loads different Notes from various backups (probably user, local and guest) every time the browser starts up.
To make matters worse, the current (latest) user Maxnotes fail to open when they load.
I do not know whether I am saying this correctly, but here is what is happening:
Startup 1:

Startup 2:

Attempting to open a Note:

This is with me logged into my account with syncing enabled.