yesterday I have done changes on some data inside 1P and also I have deleted my full bin inside 1P on the Mac. (Something between 200 and 250 changes) After that I started my iOS and Android for the sync. On iOS the sync was normal, maybe it need 30 seconds.
But on my Android the sync was very slow. At the first sync I thought the system was stop working correct. Only the icon on the top was turning. After maybe five minutes I forced to stop 1P. After a new start the same again. So at the end the sync was well done, but it needed a half eternity (more or less 10 minutes).
I think it was strange that the sync on iOS was fast and on Android so very slow. Both systems were on the same Wifi network and the data are inside Dropbox.