Issue with setting 'extent' property of mapview

[GaureeshChauhan]

The issue is that when the extent property of a mapview is changed, it causes the map to jump to (what appears to be) an arbitrary location. 

It can be seen in this codepen - https://codepen.io/gaureezh/pen/qBxmVbZ

when we remove the comment on line 40, the map location jumps to a different location.

What is the reason for this issue? How are we supposed to use the extent property of MapView.

[ReneRubalcava]

Either set the zoom and center or the extent, but don't try to do both or the map has to move from one location to another.