KeepEmptyLinesAtTheStartOfBlocks does not supported

[MinorUncle]

I set like follow:

KeepEmptyLinesAtTheStartOfBlocks: true

but a lot of result like follow:

• (void)stopAudioMix {
  G_StopAudioMix(_livePush);
  }

there are no empty line after "{"，But other format has been applied.
Is this a BUG?