Tested the issue using #65.0.3325.181 and #66.0.3359.181 on Linux debian rodete and could not reproduce the issue as per the steps mentioned below.

Steps:
1. Launched Browser
2. Opened few tabs
3. Tried copying text
4. No text disappearing is seen

@Reporter: Could you please update Chrome to latest version #66.0.3359.181 and check if you still face the issue?

Thanks!!

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

Still no help on #66.0.3359.181.

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	Peek 2018-05-28 21-32.mp4 95.4 KB View Download

Unable to reproduce the issue on ubuntu 17.10 using chrome latest stable #66.0.3359.181 and latest chrome version #69.0.3443.0.

Attached a screen cast for reference.

Following are the steps followed to reproduce the issue.
------------
1. Opened gmail.com.
2. Clicked on the compose box and selected text.
3. Observed that text input did not disappear on clicking or changing focus.

mmyangfl@ - Could you please check the attached screen cast and please let us know if anything missed from our end.

Thanks...!!

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	845421.webm 3.0 MB View Download

hmm, seems a ibus-related problem. Everything ok when I terminate ibus.

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

As per comment#9 it is understood that by terminating ibus, the issue is no longer seen. In that case could you please let us know if we can close this issue!

Thanks!

Yes close it please

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

As per comment#12 closing this issue and marking it as Won't fix.

Thanks!