Breaking apply_filters('the_content) for me

To clarify, the $overview variable doesn’t have any Groups shortcodes in it, just HTML content and sometimes other shortcodes.

Sounds familiar due to other plugin creating a conflict … what other plugins are active?

Here’s a screenshot of all of the plugins I’m using: https://d.pr/i/eA8h

That’s a lot of plugins ??

You could try disabling all plugins except WooCommerce, Groups and the basic ones integrating these with each other along with subscriptions and see if your code works fine on that setup. If it doesn’t then probably it’s related to the context you are using that snippet within. If it does work, it smells like conflict and you would apply the usual procedure … enable plugins individually until it stops working.