Unable to run "sta+ap" on my ESP32S

Yes it seems ESP32 wifi station connect eats up all heap memory!

This is what happened after a reset(true)

>wifi=require("Wifi")
=function () { [native code] }
>wifi.startAP("test",{authMode:'open'});
=undefined
>wifi.connect("xxxx",{password:"xxxxxxxx"},(err)=>{if (err){print(err);return;}print("connected");});
ERROR: Wifi: event_handler STA_START: esp_wifi_connect: 12298(SSID is invalid)
=undefined
>E (27318) event: post event to user fail!
ESP32.getState()
={ 
  sdkVersion: "v3.1.3-dirty", 
  freeHeap: 33856, BLE: false, Wifi: true, minHeap: 21880 }
WARNING: Wifi:startMDNS - espressif
connected
>ESP32.getState()
={ 
  sdkVersion: "v3.1.3-dirty", 
  freeHeap: 3112, BLE: false, Wifi: true, minHeap: 3044 }
>

You can see that the freeHeap dropped dramatically after connecting to the local network!