WDT timeout whne I use Canvas scroll()

[ziv2013]

I have written a simple test program:

1.Draw a Rectangle
2.Move it with scroll()

But the program would crash with below error

"E (27762) task_wdt: Task watchdog got triggered. The following tasks did not reset the watchdog in time:
E (27762) task_wdt: - IDLE (CPU 0)
E (27762) task_wdt: Tasks currently running:
E (27762) task_wdt: CPU 0:
E (27762) task_wdt: CPU 1: IDLE
E (27762) task_wdt: Aborting.

abort() was called at PC 0x400df1f5 on core 0

Backtrace: 0x40085595:0x3ffbef4c |<-CORRUPTED

ELF file SHA256: 4f932d1d8a7fc922

Rebooting..."

`#include "fabgl.h"

const int WIDTH = 640;
const int HEIGHT = 400;

// VGA 显示
fabgl::VGA16Controller DisplayController;
Canvas cv(&DisplayController);

void setup() {
Serial.begin(115200);
DisplayController.begin();
// 设定分辨率
DisplayController.setResolution(VGA_640x400_60Hz);

//cv.setScrollingRegion(0, 0, WIDTH - 1, HEIGHT - 1);

cv.drawRectangle(10,100,90,200);
}

int value = 0;
boolean LeftToRight = true;

void loop() {
if (value == WIDTH - 100) {
LeftToRight = 1;
}
if (value == 0) {
LeftToRight = 0;
}
if (LeftToRight == 0) {
cv.scroll(1, 0);
value++;
}
else {
cv.scroll(-1, 0);
value--;
}

}`

And if I add delay(10) in the end of loop(), this issue would now occur. Is there any suggestion?