Alpha Boundary/Overlay Opacity for Layer Mask Not Working

[andresl98351117]

I am following along a Lynda.com tutorial. And in the tutorial, in the layer view for a piece of footage with the mask applied I see this when the Alpha Boundary Overlay is applied.

I can see the video behind the red overlay. Mine however, shows up like this.

There is no opacity change even though it is set to 45%. And when I reduce it even further, the red just turns to a lighter shade of red. Please help, this would be an awesome feature if I can get it to work.

Things I've tried:
Running a RAM preview so the video is rendered.
Clearing Cache.
Inverting mask, setting to subtract, etc.
Changing all the RGB channels.
Making a duplicate layer without the mask underneath.

Thanks!

[Andrew Yoole]

I believe you have found a legitimate bug in the current version of AE.

I have the same failed result in CC 2017 that you have documented above.

I also tested it in CC 2014 and CC 2015 and it works just fine.

I have logged a bug report with Adobe, but I suggest you do the same:

Feature Request/Bug Report Form

[Roei Tzoref · Accepted solution]

This is indeed a bug since cc2015. Turn off hardware acceleration in the preferences->display and it will return to normal.

[andresl98351117]

Are there any significant drawbacks I'll get by turning off mt hardware acceleration?

[Roei Tzoref]

I have never experienced an improvement in performance using this feature. but then again, it was always buggy so I usually turned it off.