Is there any proper documentation from Android Team why filter in BLE is not working for android 4.4 and 4.3 devices?

Question

Is there any proper reason from Android team why BLE filter is not working for Android 4.3 and 4.4 devices? I need to explain this issue to my client.

private List<UUID> parseUuids(byte[] advertisedData) {
    List<UUID> uuids = new ArrayList<UUID>();

    ByteBuffer buffer = ByteBuffer.wrap(advertisedData).order(ByteOrder.LITTLE_ENDIAN);
    while (buffer.remaining() > 2) {
        byte length = buffer.get();
        if (length == 0) break;

        byte type = buffer.get();
        switch (type) {
            case 0x02: // Partial list of 16-bit UUIDs
            case 0x03: // Complete list of 16-bit UUIDs
                while (length >= 2) {
                    uuids.add(UUID.fromString(String.format(
                            "%08x-0000-1000-8000-00805f9b34fb", buffer.getShort())));
                    length -= 2;
                }
                break;

            case 0x06: // Partial list of 128-bit UUIDs
            case 0x07: // Complete list of 128-bit UUIDs
                while (length >= 16) {
                    long lsb = buffer.getLong();
                    long msb = buffer.getLong();
                    uuids.add(new UUID(msb, lsb));
                    length -= 16;
                }
                break;

            default:
                buffer.position(buffer.position() + length - 1);
                break;
        }
    }

    return uuids;
}