Using the pmpro_levels shortcode on a page not assigned as the Membership Levels page fails.

[kimcoleman]

In this line the logic to check the content of the page is only true IF the page is also the assigned "Membership Levels" page under Memberships > Settings > Page Settings https://github.com/strangerstudios/pmpro-multiple-memberships-per-user/blob/dev/includes/overrides.php#L154

The logic here needs to be updated to specifically check the content regardless of whether it is assigned in the $pmpro_pages global as $pmpro_pages['levels'];