CC1312R: Timer Start&Stop

Hi, 

I am working on LAUNCHXL-CC1312R1 board and rfEasyLinkRx example.

Setup of the timer and the interrupt is;

 GPTimerCC26XX_Params params;

    params.width          = GPT_CONFIG_32BIT;
    params.mode           = GPT_MODE_ONESHOT_UP;
    params.debugStallMode = GPTimerCC26XX_DEBUG_STALL_OFF;
    hTimer = GPTimerCC26XX_open(Board_GPTIMER0A, &params);
    if(hTimer == NULL)
    {
        while(1);
    }

    /* Set Timeout value to 300ms */
    rxTimeoutVal = (SysCtrlClockGet()*3UL)/10UL - 1UL;
    GPTimerCC26XX_setLoadValue(hTimer, rxTimeoutVal);


    /* Register the GPTimer interrupt */
    GPTimerCC26XX_registerInterrupt(hTimer, rxTimeoutCb, GPT_INT_TIMEOUT);

Here is the code;

    PIN_setOutputValue(pinHandle, Board_PIN_LED2,1);
    PIN_setOutputValue(pinHandle, Board_PIN_LED2,0);

    GPTimerCC26XX_setLoadValue(hTimer, rxTimeoutVal);
    GPTimerCC26XX_start(hTimer);

    delay(250000); //delay 250 ms

    GPTimerCC26XX_stop(hTimer);
    PIN_setOutputValue(pinHandle, Board_PIN_LED1,1);
    PIN_setOutputValue(pinHandle, Board_PIN_LED1,0);

    GPTimerCC26XX_setLoadValue(hTimer, rxTimeoutVal);
    GPTimerCC26XX_start(hTimer);


while(1);

And here is the interrupt function;

void rxTimeoutCb(GPTimerCC26XX_Handle handle,
                 GPTimerCC26XX_IntMask interruptMask)
{
    /* Set the Timeout Flag */
    rxTimeoutFlag = true;

        PIN_setOutputValue(pinHandle, Board_PIN_LED2,1);
        PIN_setOutputValue(pinHandle, Board_PIN_LED2,0);

}

There is the led pins behaviour. Despite stopping the timer and reloading the value, timer goes 50 ms more and interrupt comes. After stopping and reloading value, what should I have to do for it to go 300ms and give interrupt? Thanks..