Custom datasource with `uiTools: {top: true}` will be error

[Aincvy]

How to reproduce ?

Add option uiTools: {top: true}, it appears every time.

My solution

Add delay on function iChart.Charting.ChartDataSource.prototype.onRequest .
Here is my code.

let _this = this;
setTimeout(function(){
    _this.onRequestCallback(callback, params);
}, 150);

The git file seem is: https://github.com/iguanaChart/iguanacharts/blob/master/src/scripts/lib/charting/49-chartdatasource.js