Verison: 8.2.0-Beta
Addons/Skins: Weakauras + Masque

The latest 8.2 version of Masque is causing a 1 pixel misalignment between the cooldown sweep animation and the icon. The 8.1.5-Alpha-3 version is working correctly. This is present with all of the default Masque skins, and is especially bad for the "Classic" skin.

Notice the top part of the icon is showing, as well as the cooldown sweep extending 1 pixel too far down.
Zoomed skin example
Classic skin example

I'll look into it.

What are you using for your samples? I can't see any button being that large. Classic clearly needs to be tweaked, but Zoomed is less than a pixel (everything is set for a 1.0 scale, so increasing the scale will throw it all off).

WeakAuras to help show the problem. The issue is present no matter the size,
WeakAuras
Bartender

Ok. It'll be fixed in the next push.

This should be resolved in the latest beta. Let me know if it's not.