Teensy 4.0 does not auto reboot after sketch upload

[skpang]

I'm using the beta test software 1.47-beta6 with Arduino 1.8.7 on macOS 10.14.6

When I compiled the Blinky sketch and it uploads to T4 ok, but it does not do auto reboot like the T3.2. I have to unplug and replug the USB in order to use the new sketch.

Yes, I did press the button on board for the first time. It say "Reboot OK" but it does not reboot.

Put a T3.2 in and it auto reboot fine.

Any idea why T4 does not auto reboot after a sketch upload?

 

[bicycleguy]

I think Arduino 1.8.8 helps that issue. 1.8.9 runs fine for me on 10.14.6

 

[skpang]

Just updated the Arduino IDE to 1.8.9 but still the same problem after a sketch upload. It won't auto reboot.

Anyone else seeing this problem ?

 

[PaulStoffregen]

I tried here on a Macbook Air with Mojave 10.14.6, running Arduino 1.8.9 and Teensyduino 1.47-beta6. I could not reproduce the problem.

Here's a quick screen record where I uploaded the Audio library WavFilePlayer examples 3 times. No button press required on Teensy 4.0.

 

[skpang]

Here is a video of me changing Blinky delay to 100.