Can Ink Sketch be updated?

[AshleyPikachu]

Description
When using Ink Sketch normally on a Alpha Channel all transparent pixels become black. The effect works more as expected on a solid canvas, can this be adjusted to have the alpha channel behave like the white canvas? It's likely a hold over from at least paint.net 3.5.11 as it does it in that tool as well.

White Canvas

Alpha Chanel Canvas