I have a more or less fresh install which I upgraded to Pro 5.0.0.Beta 2.
I went into the header builder and chose to use a template. (I thought it would be easier to play around. I used the starter template called Hero)
This looks fine in the builder but on the front-end there are lots of warnings as per below. There are well over 1500 lines of this error / warning.
Warning: cs_remember/cs_recall used outside of builder context | /var/www/thehiddenrealm.ex/public_html/wp-content/themes/pro/cornerstone/includes/elements/definitions/nav-layered.php line 161 in /var/www/thehiddenrealm.ex/public_html/wp-content/themes/pro/cornerstone/includes/classes/element/class-element-registry.php on line 64