Thanks for all your feedback here!
As I've mentioned above, we don't support beta releases but we do test on them internally to be ready when the public release goes out. As also mentioned, these crashes are already well documented and the team is aware of them. If you'd like to help us further, please send the crash logs to help the team to make sure all scenarios are covered.
Our beta testing program in general is by invitation only. However, we'd be happy to forward your wish to participate to the team to see if they have a place for a new tester.