Issue with Telegram bot sending duplicate messages

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I’m developing a Telegram bot to dispatch messages, but occasionally it sends out two identical messages in response. Here is my code snippet:

export async function sendToTelegram(message: string) {

    const telegramBot = new TelegramBot(TELEGRAM_BOT_TOKEN, {polling: false});
    const groupId = parseInt(TELEGRAM_GROUP_ID);

    try {
        await telegramBot.sendMessage(groupId, message, {parse_mode: 'Markdown'});
    } catch (err) {
        logger.error(`Telegram error: ${err}`);
    }
}

I’ve reviewed the documentation for the bot but haven’t found any information regarding this issue. I’m currently at a loss about what might be causing the duplicate messages.