LMX9838 Bluetooth missing byte while transmitting

Hello,
I'm using a lmx9838 mudule at 115200 baud rate to send some simple blocks of 7 byte 11 2 3 4 5 6 7  using a frequency of 25Hz and i repeat this action continuosly.. unfortunately I'm losing some bytes randomically ( i can't understand why since the frequency is low). If I read the same Usci_Ax port on my terminal using an usb cable ,I'm able to read the right message, so the bluetooth is recieving the right message but lose data while transmitting.
How can i fix this problem? 

Thank you