Getting Dummy character while receiving UART data,How to fix it ?

I am using Nuvoton MS51FB9AE MCU,while testing UART looping program I am getting Dummy character in the middle the Actual data,need help in fixing this 

#include "MS51_16K.H"

unsigned char uart_receive_data;
bit receiveFlag,bufOverFlag;

/************************************************************************************************************/
/* Main function */
/************************************************************************************************************/
void main(void)
{
P17_PUSHPULL_MODE;
/* Modify HIRC to 24MHz for UART printf function only */
MODIFY_HIRC(HIRC_24);
P06_QUASI_MODE;
UART_Open(24000000,UART0_Timer3,9600);
ENABLE_UART0_INTERRUPT; /* Enable UART0 interrupt */
ENABLE_GLOBAL_INTERRUPT; /* Global interrupt enable */

/* while receive data from RXD, send this data to TXD */
while(1)
{
if (uart0_receive_flag)
{

UART_Send_Data(UART0,uart0_receive_data);
//P17 = ~P17;
uart0_receive_flag = 0;
bufOverFlag= 0;
}
}
}

Actual data :arm community

OUTPUT : 

arm commun⸮ty

arm community
arm commu;<n⸮W⸮R⸮

arm commun⸮ty
arm commun⸮ty
arm⸮commun⸮ty
arm commun⸮ty