doc.data() // For Each doc
Array[] // Filled with data and length 54
Length: 54

Array[] // Filled with data and length 54
Length: 0
doc.data() // For Each doc

let exportArray = [];
let promises = [];

db.collection('lists').doc('List 1').collection("members")
    .get().then(function(querySnapshot) {
    querySnapshot.forEach(function(doc) {
        promises.push(
            new Promise(function (resolve, reject) {
                exportArray.push(doc.data());
                resolve();
                console.log('before');
            })
        );
    });
});

Promise.all(promises).then(function () {
    console.log(exportArray); // Logs correctly with all data with length 54
    console.log(exportArray.length); // Logs as 0 for some reason


});