TMS320F28377D: C2000 sci working with wrong behavior ..

Hi everyone!

I'm using  C2000 Delfino control card F28377D Microcontroller. I'm trying to use example from C2000ware to work with sci but I got unexpected behavior in sci_ex3_echoback example (under driverlib/f2837xd/examples/cpu1/).
 
when I start to send data using SCI_writeCharArray(); such the example :
msg = "\r\n\n\nHello World!\0";
SCI_writeCharArray(SCIA_BASE, (uint16_t*)msg, 17);
All data haven't been sent in first time.last 2 byte in 17 byte have been moved to second time.
when I try to send another msg and only I got 15 byte missing last 2 byte. That happen when I try any msg.

And also I tried to send character by character using SCI_readCharBlockingNonFIFO() ;
I have got a delay in first two byte .. after send to byte i got response on serial...

Any help please ...