[BUG] Programatic zoom resets after wheel in then out

[jimmy764]

Description

After setting zoom programmatically, scrolling in one step then out one step will reset zoom to original (as if .unzoom had been called).

I observed this with Chrome 91 & Firefox 90, but not Firefox 89.

Steps to check or reproduce

1. Load chart with "zoom" example
2. Add programmatic zoom
3. Scroll in (at least one step)
4. Scroll out (at least one step)

https://stackblitz.com/edit/udgqfr?file=index.js

var chart = bb.generate({
  data: {
    columns: [
	["sample", 30, 200, 100, 400, 150, 250, 150, 200, 170, 240, 350, 150, 100, 400, 150, 250, 150, 200, 170, 240, 100, 150, 250, 150, 200, 170, 240, 30, 200, 100, 400, 150, 250, 150, 200, 170, 240, 350, 150, 100, 400, 350, 220, 250, 300, 270, 140, 150, 90, 150, 50, 120, 70, 40]
    ],
    type: "line",
  },
  zoom: {
    enabled: true, 
  },
  bindto: "#zoom"
});

chart.zoom([24, 30]);

[netil]

Hi @jimmy764, thanks for the report.