so problem still exist.
This bad scrolling problem also exist on the Google Nexus successor Pixel2 XL.
https://productforums.google.com/forum/#!topic/chrome/Ev24GWfSEUE
He tried Opera browser v.49 on this Android 9 device that use a Qualcomm 835 highend SoC.
Thanks Andrey for your feedback.
From time to time i will report if this huge regression is solved or not.
Samsung updated it´s browser to Version 8.0.xxx and switched to chromium 63 engine.
https://play.google.com/store/apps/details?id=com.sec.android.app.sbrowser.beta&hl=de
Still smooth finger scrolling behaviour.