Tooltip not working for newly loaded data

[netil]

Description

Throwing error when new data is loaded adding new column.

Steps to check or reproduce

1. Generate and load

var chart = bb.generate({
	data: {
		columns: [
			["data1", 30, 200, 100],
			["data2", 130, 100, 140]
		]
	}
});

setTimeout(() => {
	chart.load({
		columns: [
			["data2", 44, 134, 98, 170]
		]
	});
}, 500);

2. When do over on the last data(170) of data2, is throwing error