rp2040 with 2 CDC devices USBSer1 - second port does vanish on code-upload

[s-light]

this behavior is seen on a linux and windows system:

i have setup my sketch to create the second USB-CDC port -
(based on cdc_multi.ino) similar to this:

#include <Adafruit_TinyUSB.h> Adafruit_USBD_CDC USBSer1; void setup() { Serial.begin(115200); const uint32_t start = millis(); while (!Serial && !((millis() - start) > 2000)) yield(); USBSer1.begin(115200); // serial setup done. Serial.println("Hello World on Main Serial"); USBSer1.println("Hello World on second port...."); }

and this is kind of working fine.
but it seems i have to unplug and replug the board everytime i upload a new sketch.
is this normal? or can i somehow tell my computer / the uC to recheck for the devices?!?

the main CDC port does this fine too...

i am open for any kind of help :-)

[s-light]

// If already enumerated, additional class driver begin() won't take effect // until re-enumeration if (TinyUSBDevice.mounted()) { TinyUSBDevice.detach(); delay(10); TinyUSBDevice.attach(); }

use as written in the example sketch...