My win10 use English language as default language.

And under the default ENG language US keyboard I didn't see any issue.

I'm having the issue when using the win10's default chinese input Microsoft Pinyin.

Also it works previously with the previous stable release 54.0.2840.99, so should be something wrong in Chrome.

Unable to reproduce the issue on windows 10 with chrome version #55.0.2883.87.
These are the steps i followed.
1. Installed the Chinese simplified language and made it as default.
2. Opened two chrome windows using ctrl + N command and maximized it.
3. In the window-1 omnibox, typed some random text in Chinese language
4. Now switched to Window-2, by clicking on the task-bar.
Observed that  window-2 is on top and didn't switched back to window-1.

Attaching the screen-cast for your reference, could you please try the same scenario with new profile with no apps & extensions and let us know your observations.

Deleted: Issue 679564.mp4 1.7 MB

	Issue 679564.mp4 1.7 MB View Download

Hi kkaluri，

I can reproduce the issue.
Try this: 
1. right click on windown 10 taskbar select "Setting" 

2. Under "combine taskbar buttons" select never or "when taskbar is full", if you select "when taskbar is full" make sure the multiple chrome windows isn't combined.

3. under default english language US keyboard open multiple chrome windows maximized on same monitor.

4. click window A's URL bar and switch to Microsoft Pinyin IME, and type something.

5. click another window B's icon button on the windows 10's task bar. It maybe reproduced. If the issue isn't reproduced click on the window B's URL bar and use the microsoft PINYIN to input something.

6. repeat step 5 and do the same thing on window C

7. click window A's icon button on the windows 10's task bar.

8. click window B's icon button on the windows 10's task bar.

9. click window C's icon button on the windows 10's task bar.

Hi kaluri,

Agree with raconter, you need to disable the task bar button combine. 

I also can't reproduce the issue when the multiple windows are combined to one icon button on the task bar, when they are combined you have to first click the button then select the window again which are twice clicks.

Please try to not combine the multiple windows to one taskbar button. 

Thanks.

mayerd@ in order to triage this issue could you please help us with the screen-cast  for the issue you are facing.

Thank You...

Hi kaluri,

I knew why you can't reproduce the issue.
There are 2 critical points:
1. make sure the chrome button on the taskbar are not combined.
2. change the Microsoft Pinyin IME config as in this attached screen recording. Set the "Choose how long to show the floating IME mode icon" to "1 second".

Then it can be easily reproduced by only 2 chrome windows.

The previous stable version 54.0.2840.99 doesn't have this issue.

Deleted: Recording2.mp4 4.3 MB

	Recording2.mp4 4.3 MB View Download

Set the "Choose how long to show the floating IME mode icon" to "3 seconds" also can reproduce the issue same as the "1 second" config.

Set it to "never" won't trigger the issue.

 mayerd@ Thank you for your detailed response, able to reproduce the issue with provided steps in comment #9 on windows 10 with chrome stable version #55.0.2883.87 and also in beta #56.0.2924.59, dev #57.0.2970.0, canary #57.0.2978.0 
Issue broken in M55

Bisect Info:
===========
Good build : 55.0.2883.28
Bad build  : 55.0.2883.29  

On manually looking between the CL's between good and bad builds
------------------------------------
https://chromium.googlesource.com/chromium/src/+log/55.0.2883.28..55.0.2883.29?pretty=fuller&n=10000

The suspecting Change Log is :
-----------
https://chromium.googlesource.com/chromium/src/+/a41a950192808e991cf550748a25bf51ba18f034

From the above CL suspecting the below change
---------------------------
Review-Url: https://codereview.chromium.org/2445253002

ShuChen@- Could you please look into this issue, if it's related to your change?  if not could you please help us to reassign this issue to the right owner.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/17c78241a37810aff596974cfdec60b01bc0f4c5

commit 17c78241a37810aff596974cfdec60b01bc0f4c5
Author: shuchen <shuchen@chromium.org>
Date: Sat Feb 18 13:53:24 2017

Updates the IME state when necessary when switching top-level windows.

BUG= 679564 , 680524 

Review-Url: https://codereview.chromium.org/2700933002
Cr-Commit-Position: refs/heads/master@{#451460}

[modify] https://crrev.com/17c78241a37810aff596974cfdec60b01bc0f4c5/ui/base/ime/input_method_win.cc
[modify] https://crrev.com/17c78241a37810aff596974cfdec60b01bc0f4c5/ui/base/ime/input_method_win.h

Your change meets the bar and is auto-approved for M57. Please go ahead and merge the CL to branch 2987 manually. Please contact milestone owner if you have questions.
Owners: amineer@(clank), cmasso@(bling), ketakid@(cros), govind@(desktop)

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/+/062cdaa73def7c1e0093db181810aaed74b6d182

commit 062cdaa73def7c1e0093db181810aaed74b6d182
Author: Shu Chen <shuchen@google.com>
Date: Mon Feb 20 02:08:31 2017

Updates the IME state when necessary when switching top-level windows.

BUG= 679564 , 680524 

Review-Url: https://codereview.chromium.org/2700933002
Cr-Commit-Position: refs/heads/master@{#451460}
(cherry picked from commit 17c78241a37810aff596974cfdec60b01bc0f4c5)

Review-Url: https://codereview.chromium.org/2706723002 .
Cr-Commit-Position: refs/branch-heads/2987@{#591}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}

[modify] https://crrev.com/062cdaa73def7c1e0093db181810aaed74b6d182/ui/base/ime/input_method_win.cc
[modify] https://crrev.com/062cdaa73def7c1e0093db181810aaed74b6d182/ui/base/ime/input_method_win.h

Verified the issue on Win 10 using 57.0.2987.74 and its working fine now.
Please find the scree cast for the same.

Deleted: 679564_Feb_22.mp4 4.2 MB

	679564_Feb_22.mp4 4.2 MB View Download

I can still reproduce the issue with both of the 57.0.2987.110 and 57.0.2987.98.

Deleted: Recording #5.mp4 1.2 MB

	Recording #5.mp4 1.2 MB View Download