Able to reproduce this issue on Mac OS 10.12 using chrome latest stable #56.0.2924.87. By opening the test case URL: https://jsfiddle.net/dcnsv3m2/5/ observed the scrollbar doesn't hide after scrolling and it's keep being visible after releasing the mouse.

junglefunkyman@ I have tested the same on older version of chrome #35.0.1849.0 and observed the same behavior including other browsers like Firefox and Safari as well. While looking at your screen-cast it's clear that this issue is working fine on chrome, could you please let us know on which chrome://version you are testing on it.

Thanks! 

brajkumar, I could not reproduce this issue on Firefox or Safari, and I tried very hard, are you sure you managed to do this?
Also, I don't quite understand how it's fine on my Chrome - have you watched it to the end of the video? The version is as in the description: 
56.0.2924.87 (Official Build) (64-bit)
Revision	0e9a9a6f3676ae439b78cd9b3f62b4193c3ac7d5-refs/branch-heads/2924@{#895}

Able to reproduce this issue on Mac 10.12.3 using chrome stable M56-56.0.2924.87 and earlier version of chrome M30-30.0.1549.0. Observed the scroll bar is not hiding, seen the same behavior in FireFox too.

This is a non-regression issue and marking it as untriaged.

Please look into the attached screencast.

Deleted: Issue 692887 - Chrome & FF.mp4 1.7 MB

	Issue 692887 - Chrome & FF.mp4 1.7 MB View Download

Deleted: Issue 692887 - M30.mp4 398 KB

	Issue 692887 - M30.mp4 398 KB View Download

kkaluri, from your screencasts I can see, you have selected different mode of how scroll bars work on mac. So, none of your scrollbars were hidden, and it has nothing to do with the problem, it's just your system preferences.

Please, make sure you configured scrollbars:
System Preferences -> General -> Show scroll bars -> "Automatically based on mouse or trackpad"

Deleted: 2017-02-20_1928.png 238 KB

	2017-02-20_1928.png 238 KB View Download

I can reproduce this. I see the scrollbar flicker. While it doesn't stay shown, moving the mouse over the scrollbar region will cause it to appear (which it shouldnt) and the scrollbar stays in the "expanded" state. Somethings' clearly awry.

I'll take a look as part of some Mac scrollbar cleanup I've been meaning to do but that's not likely to happen too soon.

We are seeing behavior that matches the **title** of this issue; namely, the scroll indicators are always visible on Mac despite the system preference being set to "Automatically...". Caveat: this is using Qt's QtWebEngine to host Chromium. Interestingly, it is only a problem on high-dpi systems (iMac 5K, Macbook Pro, etc.), not on an external (non-high-DPI) monitor. Thought it worth mentioning here. See also https://github.com/rstudio/rstudio/issues/1953

Re#9: Could you please file a separate bug? Feel free to assign/cc me.

I opened https://bugs.chromium.org/p/chromium/issues/detail?id=804051. Thanks.