Since upgrading from Helix Ultimate Framework version 1.1.4 to version 2.0.5, we now have an issue whereby any icons set to the main menu are now only visible on pages created with SP Page Builder. Any pages created via Joomla menu items now do not show the main menu icons.
If you take a look at this screenshot https://prnt.sc/1v0yofu you will see in the main menu at the top right that the homepage icon and the magnifying glass icon next to Search are broken and not showing.
This issue seems to be related to the Mega Menu setting being moved from a tab in the Joomla Menu Edit Item settings in Helix Ultimate Framework version 1.1.4 to the Template Settings in version 2.0.5.