I'm going through the same problem for more than 3 weeks now. Please rectify this in the upcoming release.

I am also face the same problem.
I type more mails in Tamil language.
I couldn't interact with my friends and relatives.

Kindly fix the Bug as soon as possible.

I am also having this same issue from a long time. Please clear the bugs ASAP. 

I can't use any Indic input method to compose Tamil text. I used the most recently updated Inbox app, Gmail App.

I can't use any Indic input method to compose TAMIL text. I used the most recently updated inbox app and Gmail . 
Please solved this bug

I see exactly the same problem when I use Chrome, Gmail or Inbox apps on Android

Tested in chrome # 56.0.2924.87 and Canary #59.0.3034.0 on Mac 10.12.3.Please find the screen shots for your reference.

@ muthu.n: We have tried through online Tamil keyboard(https://www.branah.com/tamil) Could you please provide us with a sample keyboard steps of the issue which would help us to triage the issue further.

Adding related components.

Thanks in Advance.

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The think the Web based keyboard sends the keystroke events through a different route. You may want to try typing with a keyboard in the system - one that uses 'composition'. Here are the steps:

macOS:
1. Go to System Preferences -> Keyboard -> Input Sources and add a Tamil keyboard. (I use Anjal)
2. Go to Gmail, open a compose window and type the following (assuming Anjal keyboard) 'mikavum arumaiyaana' (without the quotes)
3. Notice that whatever you type beyond the first letter of the second word (a), nothing gets into the text.

android:
1. Download Google Indic Keyboards and select Tamil as the language option
2. Open the Gmail app and compose a new message
3. Type the same words and notice the same behaviour.
4. The same can be seen in the Chrome, Inbox apps too.
 

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Thank you for providing more feedback. Adding requester "rbasuvula@chromium.org" to the cc list and removing "Needs-Feedback" label.

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

Thanks for the detail steps.
Tested in chrome # 56.0.2924.87 Beta # 57.0.2987.88 and Canary #59.0.3034.0 on Mac 10.12.3 and able to reproduce in stable build but fixed in latest Beta,Dev & Canary builds.We are moving the stable build to M57 soon.Please find the screen cast for your reference.

@muthu.n: Could you please let me know if i have missed anything and if possible, please install beta/canary latest chrome build with new profile and without extensions and apps.Re-check once and let us know the observation of the issue which would help us to triage the issue further.

Thanks in Advance.

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Tested in both Beta # 57.0.2987.88  and Canary # 59.0.3036.0.  The problem has disappeared. I am able to type as expected in both these builds.  Also tested Beta and Canary on Android and the bug appears to have been fixed as well. Great!

Thank you for providing more feedback. Adding requester "rbasuvula@chromium.org" to the cc list and removing "Needs-Feedback" label.

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

Thanks for the update in #14, closing now.