no smooth scrolling (vertically) with sticky column in v.1.4.0

[Draftscode]

I've created a stackblitz to show the problem. If sticky columns are activated, the table can't be scrolled smoothly (vertically). Instead the scrollbar jumps up and down and can't be dragged as expected. (just copied the example from official documentation and reduced amount of data to 80 rows)

https://stackblitz.com/edit/angular13-validation-3ygwaq?file=src/app/app.component.ts

Especially on the lower end of the scroll, scrolling becomes nearly unpredictable.