macOS Mojave 10.14.6
Affinity Designer 1.7.3
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First, here's how these exported PNGs render in the wild:
These photos are exported from the *same* artboard:
In case the screenshot of the first export doesn't have you convinced, here's the artboard fill & stroke:
(note the fill & stroke, top left)
Yes, the slice export options are the exact same:
(also notice how you can see in the slice preview that Color Horizontal is transparent but the avatar_color_why_no_transparent clearly has a white background)
I feel like this should be stupid-simple. What am I missing?
Also here's an example of these files out of preview/affinity designer so it's evident that one's transparent and one has a white background: