Could you please try the following? This would very much help our investigation!
1) When you see these "drops" on the board, could you please check what other apps you have running at the same time on your mobile device? Please make a list of the names of the apps.
2) Close all apps running and launch RealtimeBoard again and open the affected board. Please be sure to not move the canvas until the board loads completely.
3) If you see the "drops" again, please make a screenshot and send it to us. If there are no "drops" displayed, please send us the list of the apps that you made during p1.
Thanks in advance!
Looking forward to your reply,