How to recreate problem:

1. Connect Nano 33 BLE Sensor board with microUSB cable
2. Open Arduino IDE 1.8.19 (on Windows 10)
3. Open the Blink.ino sketch
4. Select the correct board and port in the Tools menu
5. Upload sketch

Observed Outcome: Selected port then changes after the sketch is uploaded. In my case it changed from COM port 13 to 14. I would then have to change it back to 13 in order to select the correct port.

IDE during sketch upload

IDE after sketch upload

Expected outcome: Port does not change after uploading sketch to board