How to exit from bootloder mode in Arduino Due?

Official Hardware Mega Due
1

PC is connected to Arduino Due by Native USB. Often after sketch uploading through Native USB, Arduino Due still keep in Bootloader mode and usb communication with PC doesn't work and sketch doesn't work.
After hardware reset of Arduino Due it become normal.

Do you know how to exit from Bootloader mode by program way? Send some command from PC?

2

Found solution of program reset, but it doesn't work ((((

~/.arduino15/packages/arduino/tools/bossac/1.6.1-arduino$ ./bossac -p ttyACM0 -R
Atmel SMART device 0x285e0a60 found
CPU reset.

It's still in bootloader mode ((

lsusb | grep boot
Bus 001 Device 020: ID 03eb:6124 Atmel Corp. at91sam SAMBA bootloader

Pls, help.......