Hi,
We’re not aware of any feature where the Yoast SEO for WordPress plugin would cause changes to the look of one of your buttons generated with the Thrive Theme on the frontend.
Just to be sure, we would like to rule out any plugin or theme conflicts that may occur. The fastest way to do this is to deactivate all non-Yoast plugins and switch to a standard theme like Twenty Nineteen.
Test this on your development or staging site, if you have one. If not, we recommend using the Health Check & Troubleshooting plugin. This plugin allows you to run a conflict check without affecting normal visitors to your site.
As we can imagine that you’re unfamiliar with checking for conflicts, we’d like to point you to a step-by-step guide that will walk you through the process: How to check for plugin conflicts.`
We are going ahead and marking this issue as resolved due to inactivity. If you require any further assistance please create a new issue.