priviliged user cant preview

im trying to use this plugin for a coming soon page.
when i have privilege to access the plugin/settings the plugin also locks me out of actually previewing the page because by default i guess it is letting only me into my normal site. i obviously want to be able to preview the page however. atm i have to logout and login with a user of lower privilige just to view the site and then log back into the priviliged used to make edits.
i forgot to say, it does let me view it as the priviliged user when i clear my browser cache. also ive on;y tried this on google chrome. so for me to preview i have to clear chache and only can see once and then cos i cleared cache need to relog back in anyhow. long story short, would be good if there was a setting to allow the priviliged user to preview or else the way i want to use it is fine if the priviliged user sees the coming soon page too by default.

hopefully u understood that dribble. not sure if anyone else has had the same problem.

https://www.ads-software.com/plugins/coming-soon-maintenance-mode-ready/