If you haven’t already done so, use Apple’s bug reporter tool and open a bug for this. Just opened one, # 43938641, that I fully expect to see marked as a dup considering the number of people hitting this problem. As others have noted, remember that when running BETA software, anything can happen and often does. Running BETA software is an exercise in avoiding Murphy’s Law. New issues can arise at anytime. Subsequent betas might contain new bugs not occurring in previous betas. Your mileage may vary. All exclusions apply unless other wise stated. Not good with any other offer. etc, etc. :-)