Unexpected account log out occurences

Hi, sometimes while working on a project or dashboard, I get automatically logged out of my account. I would have to log in again but would loose my work if not saved. I would love this to be fixed. My OS is Windows 10 Pro and I use a chrome browser. This does not occur frequently but I can recall a number of times this has happened so far. I use Dune everyday and all day and this week it has happened about three times. Cheers