And: yes, I know, that there must be a fall back for "sticky", but if the browser supports "sticky" the fall back does not kick in and so it should work. So we are her in the middle of something...

Tested in 52.0.2715.0 Canary and 50.0.2624.0 (which I happen to have on my machine). In both cases I get smooth scrolling (i.e. the header does not get chopped off as in the screenshot). The header does not stay put, however - in both cases it scrolls out of view. I don't know if that's a bug or not.

Able to reproduce the issue on Mac 10.11.4,Win 7 and Ubuntu 14.04 using stable 50.0.2661.86/50.0.2661.87 and canary 52.0.2727.0.This is a non regression issue seen from 30.0.1549.0.

Note : Its working fine on FireFox 45 where the headers stay while scrolling down.

I'm assuming that everyone who has been able to reproduce this was running with the experimental web features flag turned on. Without that, chrome does not yet support position sticky and it will behave normally.

It looks like sticky with overflow doesn't correctly handle relative position children. I wrote a simple repro case here:
https://jsfiddle.net/fhypv7um/1/

Looks not table related?

Not table related. Fix is up for review: https://codereview.chromium.org/2020103002

Moving this nonessential bug to the next milestone.

For more details visit https://www.chromium.org/issue-tracking/autotriage - Your friendly Sheriffbot

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6b83939340b453504f8d5d38ba774d4f07324dd5

commit 6b83939340b453504f8d5d38ba774d4f07324dd5
Author: flackr <flackr@chromium.org>
Date: Tue Jul 05 22:04:11 2016

Fix sticky constraints and update sticky layer positions recursively after scroll.

Sticky position constraints were being computed relative to the current scroll position which led to incorrect constraints when updated after the ancestor scroller had been scrolled. This fixes that as well as updating descendant layer positions after scroll to fix 606732.

BUG= 606732 
TEST=fast/css/sticky/sticky-clip-rel-child.html

Review-Url: https://codereview.chromium.org/2020103002
Cr-Commit-Position: refs/heads/master@{#403828}

[add] https://crrev.com/6b83939340b453504f8d5d38ba774d4f07324dd5/third_party/WebKit/LayoutTests/fast/css/sticky/sticky-clip-rel-child-expected.html
[add] https://crrev.com/6b83939340b453504f8d5d38ba774d4f07324dd5/third_party/WebKit/LayoutTests/fast/css/sticky/sticky-clip-rel-child.html
[modify] https://crrev.com/6b83939340b453504f8d5d38ba774d4f07324dd5/third_party/WebKit/Source/core/core.gypi
[modify] https://crrev.com/6b83939340b453504f8d5d38ba774d4f07324dd5/third_party/WebKit/Source/core/frame/FrameView.cpp
[modify] https://crrev.com/6b83939340b453504f8d5d38ba774d4f07324dd5/third_party/WebKit/Source/core/frame/FrameView.h
[modify] https://crrev.com/6b83939340b453504f8d5d38ba774d4f07324dd5/third_party/WebKit/Source/core/layout/LayoutBoxModelObject.cpp
[add] https://crrev.com/6b83939340b453504f8d5d38ba774d4f07324dd5/third_party/WebKit/Source/core/layout/LayoutBoxModelObjectTest.cpp
[modify] https://crrev.com/6b83939340b453504f8d5d38ba774d4f07324dd5/third_party/WebKit/Source/core/page/scrolling/StickyPositionScrollingConstraints.h
[modify] https://crrev.com/6b83939340b453504f8d5d38ba774d4f07324dd5/third_party/WebKit/Source/core/paint/PaintLayerScrollableArea.h