Auto save is not working

The adobe beta version is not saving every three minutes as advertised. I also know that I manually saved this document, but my four hours of work is gone after my page reloaded. This is the third time that this has happened to me which is basically unacceptable. If the program is going to erase all of my work every time I use it then this program is not for me. I am very unhappy with the beta version of Illustrator and beg that you come up a compatable version for the Windows Surface Book. The Beta version is inferior in every way, and I am sure other creators are just as frustrated with the poor usablilty, saveability and everything about the Beta version of Illustrator. It is terrible, worse than canva. And I hate canva.