Successful HTTPS Get request on server side but TCP closed on arduino side

[AaronConvery]

What are you working with?
Modem: SIM7600E-H
Main processor board: ESP-32-WROVER-E
TinyGSM version: 0.11.7
Code: /**************************************************************
*

TinyGSM Getting Started guide:
NOTE:
Some of the functions may be unavailable for your modem.
Just comment them out.
**************************************************************/

#define TINY_GSM_MODEM_SIM7600

// Set serial for debug console (to the Serial Monitor, default speed 115200)
#define SerialMon Serial

// Set serial for AT commands (to the module)
#define SerialAT Serial1

// See all AT commands, if wanted
// #define DUMP_AT_COMMANDS

// Define the serial console for debug prints, if needed
#define TINY_GSM_DEBUG SerialMon

/*

Tests enabled
*/
#define TINY_GSM_TEST_GPRS true
#define TINY_GSM_TEST_TCP true
// powerdown modem after tests
#define TINY_GSM_POWERDOWN true
// set GSM PIN, if any
#define GSM_PIN ""

// Your GPRS credentials, if any
const char apn[] = "your_apn"; // Your operator APN
const char gprsUser[] = "your_gprs_user";
const char gprsPass[] = "your_gprs_password";

// Server details to test TCP/SSL
const char server[] = "your_server";
const char resource[] = "/your_resource";
const int port = 443;

#include <TinyGsmClient.h>
#include <ArduinoHttpClient.h>
#include "SSLClient.h"
#include "utilities.h"
#include "certs.h"

#ifdef DUMP_AT_COMMANDS
#include <StreamDebugger.h>
StreamDebugger debugger(SerialAT, SerialMon);
TinyGsm modem(debugger);
#else
TinyGsm modem(SerialAT);
#endif

// HTTPS Transport
TinyGsmClient base_client(modem, 0);
SSLClient secure_layer(&base_client);
HttpClient client = HttpClient(secure_layer, server, port);

void setup()
{
// Set console baud rate
SerialMon.begin(115200);
delay(10);

// Set GSM module baud rate
SerialAT.begin(UART_BAUD, SERIAL_8N1, MODEM_RX, MODEM_TX);

/*
The indicator light of the board can be controlled
*/
pinMode(LED_PIN, OUTPUT);
digitalWrite(LED_PIN, HIGH);

/*
MODEM_PWRKEY IO:4 The power-on signal of the modulator must be given to it,
otherwise the modulator will not reply when the command is sent
*/
pinMode(MODEM_PWRKEY, OUTPUT);
digitalWrite(MODEM_PWRKEY, HIGH);
delay(300); //Need delay
digitalWrite(MODEM_PWRKEY, LOW);

/*
MODEM_FLIGHT IO:25 Modulator flight mode control,
need to enable modulator, this pin must be set to high
*/
pinMode(MODEM_FLIGHT, OUTPUT);
digitalWrite(MODEM_FLIGHT, HIGH);

//Add CA Certificate
secure_layer.setCACert(root_ca);
}

void light_sleep(uint32_t sec )
{
esp_sleep_enable_timer_wakeup(sec * 1000000ULL);
esp_light_sleep_start();
}

void loop()
{
bool res ;

// Restart takes quite some time
// To skip it, call init() instead of restart()
DBG("Initializing modem...");
if (!modem.init()) {
if (!modem.restart()) {
DBG("Failed to restart modem, delaying 10s and retrying");
// restart autobaud in case GSM just rebooted
return;
}
}
#if TINY_GSM_TEST_GPRS
/* Preferred mode selection : AT+CNMP
2 – Automatic
13 – GSM Only
14 – WCDMA Only
38 – LTE Only
59 – TDS-CDMA Only
9 – CDMA Only
10 – EVDO Only
19 – GSM+WCDMA Only
22 – CDMA+EVDO Only
48 – Any but LTE
60 – GSM+TDSCDMA Only
63 – GSM+WCDMA+TDSCDMA Only
67 – CDMA+EVDO+GSM+WCDMA+TDSCDMA Only
39 – GSM+WCDMA+LTE Only
51 – GSM+LTE Only
54 – WCDMA+LTE Only
*/
String ret;
do {
ret = modem.setNetworkMode(54);
delay(500);
} while (!ret);

String name = modem.getModemName();
DBG("Modem Name:", name);

String modemInfo = modem.getModemInfo();
DBG("Modem Info:", modemInfo);

// Unlock your SIM card with a PIN if needed
if (GSM_PIN && modem.getSimStatus() != 3) {
modem.simUnlock(GSM_PIN);
}

DBG("Waiting for network...");
if (!modem.waitForNetwork(600000L)) {
light_sleep(10);
return;
}

if (modem.isNetworkConnected()) {
DBG("Network connected");
}
#endif

#if TINY_GSM_TEST_GPRS
DBG("Connecting to", apn);
if (!modem.gprsConnect(apn, gprsUser, gprsPass)) {
light_sleep(10);
return;
}

res = modem.isGprsConnected();
DBG("GPRS status:", res ? "connected" : "not connected");

String ccid = modem.getSimCCID();
DBG("CCID:", ccid);

String imei = modem.getIMEI();
DBG("IMEI:", imei);

String imsi = modem.getIMSI();
DBG("IMSI:", imsi);

String cop = modem.getOperator();
DBG("Operator:", cop);

/* Network mode : AT+CNSMOD
0 – no service
1 - GSM
2 - GPRS
3 - EGPRS (EDGE)
4 - WCDMA
5 - HSDPA only(WCDMA)
6 - HSUPA only(WCDMA)
7 - HSPA (HSDPA and HSUPA, WCDMA)
8 - LTE
9 - TDS-CDMA
10 - TDS-HSDPA only
11 - TDS- HSUPA only
12 - TDS- HSPA (HSDPA and HSUPA)
13 - CDMA
14 - EVDO
15 - HYBRID (CDMA and EVDO)
16 - 1XLTE(CDMA and LTE)
23 - eHRPD
24 - HYBRID(CDMA and eHRPD)
*/
modem.sendAT(GF("+CNSMOD?"));
if (modem.waitResponse(GF(GSM_NL "+CNSMOD:")) != 1) { }
int nmodec = modem.stream.readStringUntil(',').toInt() != 0;
int nmode = modem.stream.readStringUntil('\n').toInt();
modem.waitResponse();
DBG("Network Mode:", nmode);

IPAddress local = modem.localIP();
DBG("Local IP:", local);

int csq = modem.getSignalQuality();
DBG("Signal quality:", csq);
#endif

#if TINY_GSM_TEST_TCP && defined TINY_GSM_MODEM_HAS_TCP
if (!modem.isGprsConnected()) {
DBG("... not connected");
} else {
DBG("Connecting to ", server);
// Make a HTTPS GET request:
Serial.println("Making GET request securely...");
client.get(resource);
int status_code = client.responseStatusCode();
String response = client.responseBody();

Serial.print("Status code: ");
Serial.println(status_code);
Serial.print("Response: ");
Serial.println(response);

client.stop();        

}
#endif

#if TINY_GSM_TEST_GPRS
modem.gprsDisconnect();
light_sleep(5);
if (!modem.isGprsConnected()) {
DBG("GPRS disconnected");
} else {
DBG("GPRS disconnect: Failed.");
}
#endif

#if TINY_GSM_POWERDOWN
// Try to power-off (modem may decide to restart automatically)
// To turn off modem completely, please use Reset/Enable pins
modem.poweroff();
DBG("Poweroff.");
#endif

SerialMon.printf("End of tests. Enable deep sleep , Will wake up in %d seconds", TIME_TO_SLEEP);

//Wait moden power off
light_sleep(5);

esp_sleep_enable_timer_wakeup(TIME_TO_SLEEP * uS_TO_S_FACTOR);
delay(200);
esp_deep_sleep_start();

while (1);
}

Scenario, steps to reproduce
When I use the example HTTPS Get code for the SIM7600 provided with the SSLClient library I can make a successful Get request to the given server and resource. However when I change the address to my specific server and resource it keeps closing the connection straight after making the request then re-opening it and closing again with an error. I can see on my server side that it is actually logging the get requests as successful with status code 200 but it never prints in my serial

Expected result
I should be receiving the expected string back from my server after a successful get request

Actual result
Below are the logs of what Im actually getting with server name redacted
10:11:45.493 -> [1521] Connecting to [server]
10:11:45.532 -> Making GET request securely...
10:11:45.532 -> AT+CIPCLOSE=0
10:11:45.532 ->
10:11:45.532 -> +CIPCLOSE: 0,4
10:11:45.532 ->
10:11:45.532 -> ERROR
10:11:45.532 -> AT+CIPRXGET=1
10:11:45.532 ->
10:11:45.532 -> OK
10:11:45.532 -> AT+CIPOPEN=0,"TCP","[server]",443
10:11:45.532 ->
10:11:45.532 -> OK
10:11:45.736 ->
10:11:45.736 -> +CIPOPEN: 0,0
10:11:45.736 -> AT+CIPCLOSE=0
10:11:45.736 ->
10:11:45.736 -> OK
10:11:45.736 -> Failed to make GET request, error: -1
10:11:45.736 -> Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.