Bug Report: My Test Environment :
Arduino 1.8.10,WIN 10,HC06 as Bluetooth Serial Device
When opening the Serial Monitor it seems that in that moment
the COM Port is opened, conecting.
All works fine, i can send / read Data to / from Bluetooth Serial.
But when Closing the Serial Monitor, i think a Disconnect/Closing of the Serial Port
is done. And this hangs!!! Serial Monitor and also Arduino IDE becomes in operatable,
not reacting on any MouseClicks, ... .
This effect is not noticable with other Terminal Programs like HTERM or PUTTY.