Links in all browsers which do not have the underline styling checked in either the customizer or the Weaver Xtreme 5.0.2 Options show as underlined links.
Further in Chrome the hover color is not following my configuration.
Since you have so many sites, I’m assuming that you must be using some sort of manager plugin to auto-update the theme.
This is can cause issues like that. That issue should be fixed with V5.0.3. Before, with an autoupdated theme would be showing the default “blank” theme rather that your previous design. Eventually, you might want to login in as an admin, and look at the site while logged in. This should force things to work as intended – which previously had assumed that the theme would be manually updated.