Thanks for filing the issue... 

Unable to reproduce the issue on reported chrome version 71.0.3578.98 using Windows 10 Surface.Attaching screen-cast for reference.
Steps: 
-----
1. Launched reported chrome 
2. Opened chrome://flags > enabled and disabled Custom-drawn Windows 10 Titlebar
3. Clicked on minimize/maximize/close
As we have observed that the browser have minimize/maximize/close

@Reporter: Could you please check the attached screencast and let us know if we missed anything form our end and if possible provide screencast for better understanding of the issue.

Thanks.!

Deleted: 918924.mp4 6.7 MB

	918924.mp4 6.7 MB View Download

Hello,

I confirm the issue too, we have a lot of impacted users.
Not only with Surface but all of our touch devices.

@phanindra.mandapaka :
You have to click with touch, not with your mouse ;-)

Try it and let us know the result.

Regards,
Thomas

Some news from my side.

In December 2018, we had the issue on all laptops with touch screen (and tablets).

Now, with the 71.0.3578.98, it's a little bit different but still not totally resolved.

On HP EliteBook x360 1030 G2, I don't have any issue now.

On HP EliteBook x2 1012 G1, I have the issue, but with a little change :
With custom-draw titlebar to default (enabled), minimize/maximize/close buttons not working with touch.
With custom-draw titlebar to disabled, minimize/maximize/close buttons work ONLY if it's NOT maximized, else not.

Phanindra, 
Just to clarify this works when enabled for you?

I can get it to work properly on my surface when the flag is set to disabled, but either with it set to default or enabled I cannot minimize/close chrome when using touch.  Touchpad/mosue work as expected. 

Thanks,
Devin Weingart 

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

Same issue than this one ?
https://bugs.chromium.org/p/chromium/issues/detail?id=897662

Retried the issue on reported chrome version 71.0.3578.98 using Windows 10 Surface and windows HP Pro.Attaching screen-cast for reference.
Steps: 
------
1. Launched reported chrome 
2. Opened chrome://flags > set to enabled, disabled default > Custom-drawn Windows 10 Titlebar
3. Clicked on minimize/maximize/close
As we have observed that the browser have minimize/maximize/close

@Reporter: Could you please check the attached screencast and let us know if we missed anything from our end and also can you please confirm that the issue is specific to HP EliteBook x2 1012 G1 system.

Thanks..!

Deleted: 918924 (1).mp4 17.3 MB

918924 (1).mp4 17.3 MB Download

I'll try on different devices.

But I think it's a known issue, like described here :
https://bugs.chromium.org/p/chromium/issues/detail?id=897662

It's marked as "Verified" and it will be corrected on 72 stable version, no ?

Tested on HP x2 1012 G2, minimize/maximize/close buttons not working with default/enabled/disabled.