Anyone else experienced the piping sounds when scrolling through a video (QuickTime, VLC Player, Safari, etc) How they will fix it again.

Hello,does anybody observe an issue in System preferences and Trackpad or Mouse that the Preview Videos from the functions are not working? allreday sent an Bug Report but this could fix by using a better internet connection they said. My internet connection is very fast >240MB and the same is at my workplace with another computer.I am using macOS Sierra Dev 3 and Dev 4 16A239m27399619

2 questions actually: Has anyone recognised any issues on Safari (for the last weeks) not only on beta programs that website just stay blank and gave error messages like that one on Facebook? Minified invariant #11799; Params: 1768468 [Caught in: Module "SchedulerFb-Internals_DO_NOT_USE"] [Caught in: Module "JSScheduler"] [Caught in: Requiring module "JSScheduler" which threw an exception] Vanilla Safari with no ad blocker or other extensions and Safari preferences turn off (enable content blocker in safari website settings) ill try to upload a screenshot as well. The second question is also Safari why I cannot choose anymore to open Safari with an empty website? Every time when I close the browser on a secure website like bank or work related sites and open again the website is broken and I can either empty caches or try to force close safari and sign in again with 2FA on the websites, thats annoying Apple.

Does anyone know how to contact Developer Support? Trying to change my address as I moved to another country last year. The phone numbers only show "not available" and my emails support with the address change (8 of them since November) are unanswered and still no changes. Any help would be nice.

Has anyone encountered some issues with macos Catalina10.15.2 Beta (19C46a) and Safari Browser 13.0.4 (15608.4.9.1.3) Websites like Youtube and Twitter shows up in a weired style terrible to use it. One resolution is for twitter setup the page zoom down to 85% Greetings, Schuffi