Plugin not working with host – Filter options available?

This plugin does utilize the same filters you would use in functions.php. Which host is it?

Flywheel is our host.

Flywheel has a special system for updating and keeping WordPress websites up to date.

By default, Flywheel automatically updates customer sites to the latest version of the WordPress core—although you may opt out of major version updates.

Because Flywheel handles updates for you, you cannot run updates from within the WordPress backend like you might on other hosts or on a local setup.

https://getflywheel.com/wordpress-support/how-does-flywheel-deal-with-updates-to-the-wordpress-core/

I also found this.

If there are other settings you need added to your wp-config.php file, please contact Flywheel support and we’d be happy to help out.

https://getflywheel.com/wordpress-support/how-do-i-make-changes-to-my-wp-config-php-file/

So I would contact them and see what they have to say. From what I can tell they won’t let you change the minor auto core updates, but they will disable major versions from auto updating.