Able to reproduce the issue on chrome reported version# 68.0.3440.84 and on latest chrome# 70.0.3515.0 using Ubuntu 14.04, Mac 10.12.6 and Windows-10. As this is seen from M62(the response for "await new Promise(resolve => setTimeout(() => resolve("hello"), 2000))" is seen in console) , hence considering this issue as Non-Regression and marking it as Untriaged.

Thanks!

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/96d3f1ad998aff72e39ecf86982df0c9309b485e

commit 96d3f1ad998aff72e39ecf86982df0c9309b485e
Author: Erik Luo <luoe@chromium.org>
Date: Tue Aug 14 17:52:38 2018

DevTools: fix repeat bubble overlap for commands, results

Console Commands and Results no longer show a repeat count bubble.
It was possible to get consecutive Commands using expressions
starting with 'await', which collapsed when they should not.

Screenshot: https://imgur.com/a/8iOkL9p

Bug:  871940 
Change-Id: I1dc2306d13c1511daa92fcd678520f3e8706e853
Reviewed-on: https://chromium-review.googlesource.com/1173265
Reviewed-by: Andrey Lushnikov <lushnikov@chromium.org>
Commit-Queue: Erik Luo <luoe@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582968}
[modify] https://crrev.com/96d3f1ad998aff72e39ecf86982df0c9309b485e/third_party/WebKit/LayoutTests/http/tests/devtools/console/console-repeat-count-expected.txt
[modify] https://crrev.com/96d3f1ad998aff72e39ecf86982df0c9309b485e/third_party/WebKit/LayoutTests/http/tests/devtools/console/console-repeat-count.js
[modify] https://crrev.com/96d3f1ad998aff72e39ecf86982df0c9309b485e/third_party/blink/renderer/devtools/front_end/console/ConsoleView.js

Thanks for the report, and repro case.

No problem! Thank you and all the Chromium developers for all the good work and dedication.