You may be sick and slow but obviously still rather competent using Beta software.I often wiped everything until a few years ago, but now I am sick and slow.
Strangest thing is that Beta 4 had fixed this. And I also never really had any problem except this although I started on day one with 15.0 DB1.
Can I ask why you are using beta? For a specific purpose, developing an app, for OS troubleshooting, just curious?
No wrong answer. Just curious. Beta and alpha software is notorious for bugs.