Stones jumping to k19 when submitting move

[Pempu]

Seems like this old old bug.

Stone put where i don't want (BUG)

in the game https://online-go.com/game/1234869 , there is a bug when i play : i put a stone at H4 (i am white) and when i valid, it moves it to J19 !!! My opponent don’t want to comme back. I use a tablette, with android. What could i do ?

There are now some 4-5 threads about this.