Invert artifacts

[bitbof]

• Tested in Chrome (Win10, macOS), Does not happen in Firefox (Win10)
• Paint with Blend brush on new layer
• Invert that layer a lot (10+ times)
• Artifacts will form. (Won't happen on a layer where all pixels are fully opaque)

Looks like an issue with Chromium. -> I will create a Chromium ticket.

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Example (using this image: https://i.imgur.com/JtvO7zc.png)

Before:

After:

Artifacts in detail

It can be more pronounced than that.

Invert shader:

uniform sampler2D texture;
varying vec2 texCoord;

void main() {
    vec4 color = texture2D(texture, texCoord);
    gl_FragColor = vec4(1.0 - color.r, 1.0 - color.g, 1.0 - color.b, color.a);
}