nRF7002 DK with MQTT: os: ***** USAGE FAULT ***** os: Stack overflow (context area not valid)

Dear Expert,

I'm try to use MQTT with my nrf7002 DK. 

But met Stack Overflow:

I notice the line:[00:00:14.486,053] <err> os: Faulting instruction address (r15/pc): 0x0003a68c, and then found this address points to: _svfprintf_r

I then refer to this post  snprintf with float leads to hardfault   but the issue still exist after CONFIG_NEWLIB_LIBC_FLOAT_PRINTF=y. 

I also attached the whole freestanding folder from vscode. I use nrf sdk 2.4.0. 

1452.wifi_station_try_mqtt.zip

Thanks,