Stacked email images displaying with 1px gaps in-between (mobile)

[emocean_mag]

Hi all,

While creating campaigns in the email app, I'm having difficulty getting stacked, full-width images to render without gaps in-between on mobile. On desktop there are no 1px lines between images, but on mobile I haven't been able to figure out how to get rid of them, despite changing individual images' background colors or the entire email content background's color.

For context, we've been slicing images that contain text vs manually coding these emails. I understand this isn't best practice, but it's fast and we're able have more visual customization this way.

Screenshots were taken in Gmail desktop app and mobile app on iPhone.

Any advice is apprciated