Are you changing the port? Windows will probably assign it a different port, even if you plug it into the exact same USB port with the exact same cable that you just pulled out of the first board.

You're right, it's setup that is delayed. And it's something to do with RAM- Setting "PSRAM" to "Enabled" in the ESP32 Dev Module options also creates the ~1500ms delay. I've set up ESP-IDF and had a play. Enabling CONFIG_SPIRAM_SUPPORT adds a negligible difference whether or not CONFIG_SPIRAM_MEMTE...

There is a 1500ms delay between WiFi.begin() and SYSTEM_EVENT_WIFI_READY using an ESP32-WROVER with "ESP32 WROVER Module" selected as board in Arduino IDE. This problem does not occur if a different board is selected. Tested using the same ESP32-WROVER physical module but with "ESP32 Dev Module" sel...