Possibly related to the recent change in:
The default role is set to 0 (which is incorrect).
This causes database users to have invalid grants.
This breaks the cPanel "Databases" interface. (Screenshot attached) This does not occur for all servers that update to these versions and the cause of some of them breaking has yet to be determined.
Downgrading solves the issue. Additionally, another workaround that we have used is to set the default role to NONE.