Ok I changed the template name inside buddypress.php and then installed the parent theme on a staging site. Still no good.
I have this at line 387 in functions.php:
function themonic_content_width() {
if ( is_page_template( ‘page-templates/full-width.php’ ) || is_page_template( ‘page-templates/buddypress.php’ ) || is_attachment() || ! is_active_sidebar( ‘themonic-sidebar’ ) ) {
global $content_width;
$content_width = 1040;}
And the buddypress.php file is in the page-templates folder…