I realize this is an old thread, but I just dug out some Teensies that were sitting idle. Most of them tested fine, but 2 Teensy 4.0 did not. They are not detected when trying to flash via Teensyduino. I'm now using Windows 11, Arduino 2.3.2 and Teensyduino V1.59. Other 4.0s and 4.1s are...