i have similar issue with telegram connecting to google GAS. I get infinite loop of good reply from GAS into my telegram group. Debugging looks good with no issues.  GAS deployed as webapp. Passing single parameter from telegram:

https://api.telegram.org/bot1234567890......./setWebhook?url=https://script.google.com/macros/s/1234567890................/exec?community=PARM12345

https://api.telegram.org/bot123456...../getWebhookInfo   shows:

{
  "ok": true,
  "result": {
    "url": "https://script.google.com/macros/s/123456......./exec?community=GINDI",
    "has_custom_certificate": false,
    "pending_update_count": 1,
    "last_error_date": 1764588546,
    "last_error_message": "Wrong response from the webhook: 302 Moved Temporarily",
    "max_connections": 40,
    "ip_address": "100.200.700.500"
  }
}


Did not configure any google APIs, ot the configuration.


function doPost(e) { 
  const finalResponse = ContentService.createTextOutput('{}').setMimeType(ContentService.MimeType.JSON);
  if (!e || !e.postData || !e.postData.contents) {
    // ❗ prevents Telegram from retrying
    return finalResponse; 
  } 
  // Initialize services
  let update = null; 
  try {
    update = JSON.parse(e.postData.contents);
  } catch (err) {
    //Logger.log("Invalid JSON update, ignored.");
    return finalResponse;
  }
  if (update.message?.from?.is_bot) {
    //Logger.log("Ignored bot-originated message to prevent loop.");
    return finalResponse;
  }
  const messageText = update.message?.text;
  if (!messageText || typeof messageText !== "string") {
    //Logger.log("Ignored non-text message.");
    return finalResponse;
  }
  const trimmed = messageText.trim();
  if (!trimmed.startsWith("#")) {
    //Logger.log(`Skipping: Not a command or text missing. Exiting.`);
    return finalResponse;
  }
  const cache = CacheService.getScriptCache();
  const updateId = update.update_id?.toString();
  if (updateId) {
    if (cache.get(updateId)) {
      Logger.log("Duplicate update detected → ignored.");
      return finalResponse;
    }
    cache.put(updateId, "1", 30);  
  }
  const lock = LockService.getScriptLock();
  if (!lock.tryLock(500)) {
    Logger.log("Lock busy → ignored safely.");
    return finalResponse;
  }
  try {
    let config = getScriptPropsFallback(); // Load service default config
    // --- CORE BUSINESS LOGIC STARTS HERE ---
    config.communityName = e.parameter?.community || "";
    config.chatId = update.message?.chat?.id; 
    config.userId = update.message?.from?.id; 
    config.message_id = update.message?.message_id; 
    config.messageText =trimmed;

    //  MAIN COMMAND DISPATCH
    config = Fun1(config); 
    Func2(config);
  } catch (err) {
    Logger.log(`doPost (Webhook Entry) CRASHED on update ${updateId}:`, err);
    try {
      sendReply(update.message.chat.id, update.message.message_id, "❌ System error. Admin notified.",  getScriptPropsFallback());
    } catch (e2) {}
 } finally {
    try { lock.releaseLock(); } catch (e) {}
  }   
  return finalResponse;
}


any help is welcomed. please reply to [email protected]