LP-MSPM0G3507: Uart Data Mismatch

Tool/software:

Hello TI Experts,

I am working with the G3507 board and using the UART peripheral in interrupt mode (RX only). When I send data from the serial monitor, I receive the expected data but also some additional garbage characters.

Could you please help me identify the cause? I have attached the UART code and configuration details below for your reference.

#include "ti_msp_dl_config.h"

volatile uint8_t gEchoData = 0;
int main(void)
{
    SYSCFG_DL_init();

    NVIC_ClearPendingIRQ(UART_1_INST_INT_IRQN);
    NVIC_EnableIRQ(UART_1_INST_INT_IRQN);
    DL_SYSCTL_enableSleepOnExit();

    while (1) {
        __WFI();
    }
}

void UART_1_INST_IRQHandler(void)
{
    switch (DL_UART_Main_getPendingInterrupt(UART_1_INST)) {
        case DL_UART_MAIN_IIDX_RX:
            DL_GPIO_togglePins(GPIO_LEDS_PORT,
                GPIO_LEDS_USER_LED_1_PIN | GPIO_LEDS_USER_TEST_PIN);
            gEchoData = DL_UART_Main_receiveData(UART_1_INST);
            DL_UART_Main_transmitData(UART_1_INST, gEchoData);
            break;
        default:
            break;
    }
}

Thank You
Amara Rakesh.