There is a problem. If node-zone include node-zone, the outside will be replaced by the last child zone data.

const {current} = require('node-zone');

let zone = current.fork('my zone');
zone.data = {test: 'test'};
zone.run(async () => {
    let __current = require('node-zone').current;
    console.log(__current);
    for (let i = 0; i < 50; i++) {
        (async function (i) {
            let zone = current.fork('my zone ' + i);
            zone.data = {i: i};
            // zone.run()
            // zone.set('i', 123456);
            // console.log(current);
            zone.run(async () => {
                (async function () {
                    (async function () {
                        (async function () {
                            let {current} = require('node-zone');
                            // console.log(common.timeHelper.format_ms(), current);
                            console.log(current);
                        })();
                    })();
                })();
            });
        })(i);
    }
    //will lost the current, will show the last child zone data.
    console.log('current zone data', __current);
    console.log('last child zone data', require('node-zone'));
});
return;

issue の再現から始め、current、fork、run の node-zone 実装を調べます。ネストされた非同期呼び出しを再現し、その後、なぜ外側の zone が最後の子 zone に置き換えられるのかを追跡します。子 zone の処理が完了した後も外側の current に元のデータが残っていれば完了です。