I had the same here, there were some plugins that i used, like brave für popups, that were not effected by the google fonts disabler. So I had to deactivate those plugins and find other ways to make their options possible.
For popups (brave) for example i use an elementor-addon for example, were google fonts are blockable.
But it was really tricky to detect the one special plugin that still uses google fonts. Just deactivate all plugins and activate one by one, while testing for google fonts after every single one. ??