FT232R can't detect after BPI-M3 board booting or reboot

I got a problem about FT232R connection. When I connect FT232R with BPI-M3 board, the device can’t detect FT232R after the device booting. The procedure issue:

  • Issue: FT232R connected BPI-M3 -> BPI-M3 booting -> The issue happened (BPI-M3 can’t detect FT232)
  • Non issue: BPI-M3 booting -> FT232R connected BPI-M3 -> The issue is not happened (BPI-M3 can detect FT232R normally)

Because this issue is inconvenience when reboot BPI-M3 device, I have to plug in FT232R again . Everyone please help me. Many thanks!