How to use nrf9160 as nrf52840 to connect to a OpenThread network

Question

nRF Connect SDK 2.2.0 on Windows 10 pro, I have a nrf52840-DK and a nrf9160-DK. I would like to test a simple OpenThread CLI application

I have the following prj.conf

CONFIG_LOG=y
# Network shell
CONFIG_SHELL=y
CONFIG_OPENTHREAD_SHELL=y
CONFIG_SHELL_ARGC_MAX=26
CONFIG_SHELL_CMD_BUFF_SIZE=416

# Enable OpenThread features set
CONFIG_OPENTHREAD_NORDIC_LIBRARY_MASTER=y
CONFIG_NET_L2_OPENTHREAD=y

# Generic networking options
CONFIG_NETWORKING=y
# Network parameters
# is this necessary
CONFIG_OPENTHREAD_MANUAL_START=n
CONFIG_OPENTHREAD_NETWORK_NAME="TIRIWA110"
CONFIG_OPENTHREAD_PANID=12345
CONFIG_OPENTHREAD_XPANID="fb:02:00:00:ab:cd:00:00"
CONFIG_OPENTHREAD_NETWORKKEY="00:11:22:33:44:55:66:77:88:99:aa:bb:cc:dd:ee:ff"

#other settings
CONFIG_ASSERT=y
CONFIG_ASSERT_NO_COND_INFO=y
CONFIG_MBEDTLS_SHA1_C=n
CONFIG_FPU=y

and the code is simple:

#include <zephyr/kernel.h>
#include <zephyr/kernel_version.h>
#include <zephyr/logging/log.h>
#include <zephyr/shell/shell.h>

LOG_MODULE_REGISTER(thread, LOG_LEVEL_DBG);

#define SLEEP_DURATION_MS 10000

void cmdHelp() {
	LOG_INF("board: %s", CONFIG_BOARD);
}
SHELL_CMD_REGISTER(help, NULL, "Show kernel version", cmdHelp);

void main(void)
{
	uint32_t version = sys_kernel_version_get();
	LOG_INF("Open Thread on %u.%u.%u\n", SYS_KERNEL_VER_MAJOR(version), SYS_KERNEL_VER_MINOR(version), SYS_KERNEL_VER_PATCHLEVEL(version));
	while (1)
	{
		k_msleep(SLEEP_DURATION_MS);
	}
}

for the nrf52840-dk, it works as expected. I can use "ot state" to show the role of the device. However, by copying the same configurations and code, I can not get nrf9160_52840 to work. I toggled the switch on the board to change from nRF91 to nRF52. Then I created a new application, copied the `prj.conf` and `main.c` to the new application, and added a build `nRF9160 DK NRF52840`. I also added an overlay

The content of the overlay is:

/ {
    chosen {
      zephyr,entropy = &rng;
    };
};

After `Pristine Build` and `Erase and Flash`. I can see the info is printed correctly but the Open Thread shell does not respond to any input.

When I connected to another COM port, I can see the following message:

Any suggestions to use nrf9160 as NRF52840 in an OpenThread network? Cheers