Devkit-c v2 and v4

[peterglen]

I have several Devkit-C boards for development. I am using Ubuntu 18.04 to program them; Everything works fantastic, except on the V4 I have to unplug the board (power down reset) to bring it back up. The V2 boards work flawlessly in the same situation.. When I program the ESP32 on Windows, all works well. Any settings I missed? Any way to solve this?

Environment:
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.4 LTS"

idf.py --version
ESP-IDF v4.1-dev-1572-g30372f5a4-dirty

Error was re producible on older versions.

PG