I'm running 2-TVs Firestick Gen2. I found if you don't disable "Fast Live Startup" then you'll get that few seconds of buffering(moving circle) on Live View. I do get the White screen Startup for 5-10sec only when I exited/disconnected thru the App and not logging back for awhile. But when the App was left running in the background but not idled too long and then logging back in the App, White screen only appears so fast it's hardly noticeable.. So far I don't have any problem viewing all my recordings even with Live view concurrently playing..
I did try going back to ver. 1.1.8 by using the Android Cordova Tablo App Apk. Surprisingly it worked and it solved the White Screen startup issue. All I get is the fast moving circle then follows the Tablo logo and that's it..