NATS Consumer not reading all the messages

I am trying to build a NATS consumer that reads the last message from all subjects and then closes the connection. I need to do this periodically. However, my current implementation reads only up to 500 messages. Even though there are more than 1500 messages.

How can I consume and also ensure it reads the last message from all subjects without this limitation?

My current code

val options = Options.builder()        .server("nats://url:port")        .authHandler(Nats.credentials("/Users/check/key.txt"))        .build()    val connection = Nats.connect(options)    val js = connection.jetStream()    val consumerConfig = ConsumerConfiguration        .builder()        .filterSubject("subject.>")        .deliverPolicy(DeliverPolicy.LastPerSubject)        .build()    // start the consumer    val streamContext: StreamContext = js.getStreamContext("STREAM_NAME")    val consumerContext = streamContext.createOrUpdateConsumer(consumerConfig)    val fetchConsumeOptions = FetchConsumeOptions.builder().noWait().build()    try {        consumerContext.fetch(fetchConsumeOptions).use { fetchConsumer ->            var count = 0            while (true) {                val msg = fetchConsumer.nextMessage() ?: break                count++                println("\nMessage Received:")                println(msg.subject)                println(String(msg.data, StandardCharsets.UTF_8))                msg.ack()            }            fetchConsumer.stop()            println(count)        }    } catch (e: Exception) {        e.printStackTrace()    }