Touch library doesn't work with FreeRTOS

[AaronLi]

#include <Arduino.h>
#include <M5Core2.h>

void checkLCDTask(void* pvparams){
  TickType_t lastTick;
  while(1){
    M5.update();
    if(M5.Touch.ispressed()){
      TouchPoint_t currentTouch = M5.Touch.getPressPoint();
      Serial.printf("%d %d\n", currentTouch.x, currentTouch.y);
    }
    vTaskDelayUntil(&lastTick, 20/portTICK_PERIOD_MS);
  }
}

void setup() {
  // put your setup code here, to run once:
  M5.begin(true, false, true);
  xTaskCreate(checkLCDTask, "CheckTouch", 2048, NULL, 2, NULL);
}

void loop() {
  // put your main code here, to run repeatedly:
}

This code prints only -1 -1 whenever a finger is put on the screen, if I move the M5.update() line to the loop function it will print the correct coordinates for a few seconds then return to only printing -1 -1.

I'd hope that either location for M5.update() would work correctly but I can't figure out why it isn't working.

[AaronLi]

Fixed by adding yield(); to loop function