I keep getting logged out of wordpress randomly. Despite having set long "Remember Me" times etc. I am still being required to log back in when I re-open my browser and whilst in admin, I randomly get the login pop-up asking me to log back in.

I believe this started occurring around the time of the latest Woocommerce update (the big one) but it could have been something else.

How can I monitor what is happening so I can figure out why things aren't being saved and I keep being logged out?