{{>loginButtons}} is working everywhere except a Microsoft Surface

{{>loginButtons}} is working everywhere except a Microsoft Surface. I tried Chrome, Firefox, and Edge on this device. I don’t have another to test. What could be causing this? There is no error in the console. The <div id="login-buttons" class="login-buttons-dropdown-align-"> </div> is there, but is empty.

The problem is on a production site www.LanguageTerritory.com. You may or may not see the problem depending on if it is reproducible on another Microsoft Surface or other device or if the problem is now resolved.

What should I be looking for to troubleshoot this?

This is a screenshot of the way it should look when it is displaying correctly:
screenshot of working {{>loginButtons}}