I have the following code that gets a random Firestore document given some parameters

const { onSchedule } = require("firebase-functions/v2/scheduler");
const { logger } = require("firebase-functions");

const admin = require("firebase-admin");
admin.initializeApp();
var db = admin.firestore();

function getRandomFromCollection(collection, level, enabled) {
    return new Promise(function (resolve, reject) {
        logger.info("Starting random search")
        let key = collection.doc().id;
        logger.info("random key done");
        collection.where("enabled", "==", enabled).where("level", "==", level).where("__name__", '>=', key).limit(1).get()
            .then(snapshot => {
                if (snapshot.size > 0) {
                    snapshot.forEach(doc => {
                        logger.info("done");
                        resolve(doc);
                    });
                }
                else {
                    collection.where("enabled", "==", enabled).where("level", "==", level).where("__name__", '<', key).limit(1).get()
                        .then(snapshot => {
                            snapshot.forEach(doc => {
                                logger.info("done");
                                resolve(doc);
                            });
                        })
                        .catch(err => {
                            logger.info("error");
                            reject(err);
                        });
                }
            })
            .catch(err => {
                logger.info("error");
                reject(err);
            });
    });
}

exports.newQuestions = onSchedule({
    schedule: "every day 9:55",
    maxInstances: 1,
    timeZone: "UTC"
},

    async (event) => {
        let collection = db.collection("questions");
        getRandomFromCollection(collection, 1, false).then(doc => {
            logger.info("Got question");


        }).catch(err => {
            logger.error(`ERROR! Something when wrong when generating question! Error: ${err}`)
        })

    });

I have ran this code many times in the functions emulator with no issue but when I deploy it to firebase to be ran once a day it seems to fail around every 1 in 5 calls.

When the error occurs the function logs shows the “Starting random search” and “Random key done” but then returns nothing else and the promise isn’t resolved or rejected.