I came across a strange behaviour of the UI yesterday (and in writing this I have seen that others have reported the same problem).
In two games, I placed a stone on the board and submitted the move, but instead of where I placed it, the stone appeared at position G19.
The first game is here:
https://online-go.com/game/3316429 move 73. My opponent played B8, I responded at B7, but the stone was played at G19. I have asked for an undo (no response yet).
In the other game this happened first: https://online-go.com/game/3315991 ; move 158, I played B5 but the stone was placed at G19. This first time I thought it was some kind of mistake and since I believe I am way ahead in the game I did not bother too much, but two times in the same evening this is starting to get annoying.
In both cases I was using an iPad 1, OS 8.0.2(12A405). I believe it might have to do with the iPad, because I usually play on an iPhone 6, (OS 9.1(13B143) and have never seen the issue on this device. I use the setting where I have to confirm each move. BTW: Since no move played since the mistake in the first game, I might try to reproduce the problem if my opponent grants me an undo. I could even try to do this with different devices,
If anyone has a good idea how to get rid of this, I would greatly appreciate it.