Arduino IDE 2.3.2 debugger not working

Official Hardware Nano Family Nano ESP32
7

Perhaps I spoke to soon as I can't get any I/O to happen when using the debugger.

For example, I modified the blink sketch to do a Serial.print in loop():

void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);

  Serial.begin(115200);
  delay(2000);

  Serial.println("Serial starting");
}

// the loop function runs over and over again forever
void loop() {
  static int i = 1;
  digitalWrite(LED_BUILTIN, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);                      // wait for a second
  digitalWrite(LED_BUILTIN, LOW);   // turn the LED off by making the voltage LOW
  delay(1000);                      // wait for a second
  Serial.println("Serial: " + String(i));
  i = i+1;
}

The initial Serial.println call in setup() does work but I never see the call in the loop() do anything.