At the moment when adding data to the charts in the web integration services demo, animation is used and this can show that the new point "drops all the way down to the x-axis" on the y-axis, before "animating" back to the actual point it's supposed to be at. I think this might be a consequence of one of these options
059e94f just sets animation to 'none' during update. The longer term thing is probably to look at all those 'easing' options, or possibly to reintroduce a custom canvas. All for some point in the future...
At the moment when adding data to the charts in the web integration services demo, animation is used and this can show that the new point "drops all the way down to the x-axis" on the y-axis, before "animating" back to the actual point it's supposed to be at. I think this might be a consequence of one of these options
https://www.chartjs.org/docs/latest/configuration/animations.html#easing
but there are certainly other axis specific animations.
Comments were received that this form of animation is confusing in the way it represents the data.