some users complaints that they need to login every time they opening the browser.
do you have any session disconnection issues with this theme?
The theme is working fine on my end and by the way this should't be an issue caused by the theme, but by WordPress itself. Probably they had their browser windows with private session enabled.
There aren't any disconnection issues with this theme, it must be coming from something else within your install. You can perform a few steps to isolate what is causing the issue. First, completely disable all of your plugins, then re-download a new copy of
the theme from ThemeForest and overwrite all of your current theme files
on your server with a fresh copy and see if that fixes the issue. You
won't lose any content or settings since those are stored in the
database, but if you have made any changes directly to any of the theme
code then you should make a backup of your current theme files so you
don't lose your changes.