1. Open a Javascript conosole of Devtools in Chrome Canary 69.0.3473.0
2. Press "Q" key and other keys several times.
3. Check the output of the console. No keyup event for "Q" key?

This page is related to Issue 856868.

Postscript: To our joy, this bug has been fixed in Chrome Canary 69.0.3475.0