As part of the release of Stax-managed Security Hub a new rule, Security Hub should be enabled for all regions in an account, has been added to the Stax Foundation Compliance Rule Bundle to help you follow recommended best practices. 

This compliance score is displayed on the Accounts page. If you've noticed a drop in this score, this may indicate that AWS Security Hub is not configured in that account.

To easily remediate this, configure Stax-managed Security Hub to enable the service across all accounts and supported regions.