Wrote to you previously on WordPress.org but not sure if you check comments there, so i decided to post here too.
This plugin is very useful for me but unfortunately it works only for admin users, normal-unauthorized ones can’t preview changes through urls like http://example.com/?customize_snapshot_uuid=***hash_here*** while the description page says they should. In my case it just loads the current “Published” Customizer settings from the main theme if I am viewing the snapshot as an unauthorized user. But I can preview Customizer changes fine at the same url when i am logged in as admin. I tried it on default WordPress themes, different versions (4.6.x and 4.7.x), no plugins installed with no avail is there any fix for this?

P.S. forgot to add that i couldn't find any errors anywhere in error.log also

Thanks a lot in advance!