Heartbeat timeout when I use Wifi.Mode(WIFI_AP_STA)

Need Help With My Project
1

Hardware

Hardware: ESP-8266 Wemos D1 Mini

Description

Problem description
Heartbeat timeout

#define BLYNK_PRINT Serial

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>
#include <WiFiClient.h>

char auth[] = "9e3f495xxxxx";

char ssid[] = "xxxxx"; //SSID Wi-Fi
char pass[] = "xxxxx"; //PSW Wi-Fi

WiFiServer server(80);
IPAddress IP(192,168,4,15);
IPAddress mask = (255, 255, 255, 0);

void setup() {
Serial.begin(115200);
WiFi.mode(WIFI_AP_STA);

Blynk.begin(auth, ssid, pass);

WiFi.softAP("Wemos_AP", "Wemos_comm");
WiFi.softAPConfig(IP, IP, mask);
server.begin();

}

void loop()
{
Blynk.run();
}

I can’t connect blynk to wemos when I use Wifi.Mode(WIFI_AP_STA).
The issue below.

[607] Connected to WiFi
[607] IP: 192.168.1.114
[607]
___ __ __
/ _ )/ /_ _____ / /__
/ _ / / // / _ / '/
///_, /////_
/__/ v0.5.0 on NodeMCU

[674] Connecting to blynk-cloud.com:8442
[2353] Ready (ping: 48ms).
Server started.
IP: 192.168.4.15
MAC:2E:3A:E8:43:B7:2B
[18708] Heartbeat timeout
[23425] Connecting to blynk-cloud.com:8442
[28426] Connecting to blynk-cloud.com:8442
[33427] Connecting to blynk-cloud.com:8442

Any idea?