Istanbul doesn't ignore nested if, when not executed

[danziamo]

Hello,

const wrongbranch = () => {
  const a = 2;
  if (a === 1) {
    console.log("test");
    /* istanbul ignore if */
    if (a === 3) {
      console.log("another test")
    }
  }
  return 3;
}

Saying that second if path is not taken, even though first if was not executed

However when ignore if is replaced with ignore next it displays properly and calculates branches properly

const wrongbranch = () => {
  const a = 2;
  if (a === 1) {
    console.log("test");
    /* istanbul ignore next */
    if (a === 3) {
      console.log("another test")
    }
  }
  return 3;
}

Is this a bug? or it is supposed to be like that?

Thank you.