Bluetooth connection and serial port sending

[xiaobai]

Now I come across such a problem, when the device is sending serial port data, at the same time to the mobile phone and bluetooth connection for related business processing, the bluetooth will be disconnected for a timeout.Now suspect is due to the serial port send interrupt events caused, what can be resolved?

[xiaobai]

I read the UARTE interrupt register and found that only RXTO, ERROR, ENDTX, and ENDRX were enabled to interrupt.It is not TXDRDY that causes bluetooth timeout and disconnection, but there is indeed a case of bluetooth timeout and disconnection caused by big data sent by serial port. Could you please help me to analyze and see what causes this situation?thank you