Accessibility Identifier issue in ReactNative

I am setting accessibility identifier for my components in react native using testID in iOS and accessibilityLabel in android. For iOS is working fine but for Android it my identifier is appended with , (a comma and a space). I am not sure what is causing issue. Here is my code:

const renderAccessibilityLabel = (str) => {
  const propsForAutomation = {};
  if (Platform.OS === "ios") {
    propsForAutomation.testID = str;
  } else {
    propsForAutomation.accessibilityLabel = str;
  }
  return propsForAutomation;
};

// Inside render method:
<Text {...renderAccessibilityLabel("MyText")}>{MyText}</Text>

result > ios: MyText android: MyText,

I don't know whats wrong with code :(