Updated! Apple has released the eleventh beta of iOS 12 to registered developers.
Update: iOS 12 Public Beta 9 has been released to testers. It is the same as Developer Beta 11.
See original article below
The new beta, which has only been released to developers at the time of writing contains performance improvements and probably many bug fixes.
It's unlikely any new changes or features will be discovered because we're reaching the final beta of iOS 12. We can expect to see the final beta next week, before the event. As usual, we will update the article if changes are found.