Screenshot:

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Seems to be GPU-specific.
Please attach the output from chrome://gpu.

I have a GTX 970 with driver version 416.94.

Another person on a separate machine that also sees the problem has a GTX 1070.

Unable to reproduce the issue on chrome reported version# 70.0.3538.102 using Windows-10 with steps mentioned below:
1) Launched chrome reported version and navigated to URL: https://steamdb.info/app/863550/
2) Scrolled the page up & down, didn't observed nay left-over border lines on the page

@Reporter: Please find the attached screencast for your reference, GPU details of my system. Could you please provide GPU details y navigating to Chrome://gpu and help us in further triaging it in better way.

Thanks!

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Here's my chrome://gpu report.

I've had a third user also confirm that this bug happens on their machine.

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Thank you for providing more feedback. Adding the requester to the cc list.

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

Just wanted to add this video to the post where the problem is exacerbated by changing the display scaling inside Windows on my Surface Book 2 forced at a display resolution of 1920x1080 for reproduction purposes (can't scroll down that far on a higher resolution).

At 150% scaling the problem does not seem to appear.
At 125% the problem is becoming more visible. 
At 100% the problem is very easy to see.

I've attached a chrome://gpu report from when the scaling was set to 100% at a 1920x1080 resolution.

Hopefully this helps to narrow it down!

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I reproduced the problem from scratch and attached a test file.

Basically it boils down to having `border-collapse: collapse` on table, and a border on the sticky element (table header in this case)

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Bisected to r572121 using repro.html in comment 9 and slow scrolling using the scrollbar.
Fixed via r590578 in Chrome 71 which becomes stable in December.

Able to reproduce the issue on chrome reported version #70.0.3538.102 and on latest stable #70.0.3538.110 using Windows 10. But the issue is not seen on the latest beta #71.0.3578.62. Tentatively chrome stable is moving to M-71 in next 1 to 2 weeks. Attached screenshot for reference.


@Reporter: Could you please try to test this issue on latest beta #71.0.3578.62 and let us know if the issue still persists. You can download latest chrome beta from URL: https://www.chromium.org/getting-involved/dev-channel.

Thanks!

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I just tried Canary 72.0.3618.1 (didn't want to try Dev as that would mess with my stable installation) and the bug is gone there.

Thank you for providing more feedback. Adding the requester to the cc list.

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

As per comment #12 and comment #13, closing this issue as won't fix.

@Reporter: Please feel free to raise a new issue is still seen on chrome.

Thanks!