Hi – glad you love the plugin 🙂
What you’re describing can pop up with certain themes and in some cases it may be necessary to intervene directly with the theme (if it’s possible to do so) – but before we consider more extreme measures there are some potentially easier avenues we can explore.
The first thing to try is adding a short line of code to your wp-config.php file:
define( 'TRIBE_MODIFY_GLOBAL_TITLE', true );
Could you give that a go and see if it helps at all with this problem?