Can you try with a longer sample? There's a size below which Ren'Py can't keep up with starting and stopping the samples. (I don't think this code changed between 6.10 and 6.11, though.)
Can you try with a longer sample? There's a size below which Ren'Py can't keep up with starting and stopping the samples. (I don't think this code changed between 6.10 and 6.11, though.)