Help with Mailchimp image card

I can’t figure this out… I’ve made an image card with a background colour that keeps adding a small bit of background to the far left side of the image (see red arrow in photo) How do I get rid of that?

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The text position is set to right, the image alignment is set to left, the left text width is set to half and I’ve checked edge to edge (otherwise I get a larger border around the entire image)
I’ve tried image size of 564x564 AND 528x528… but no luck either way.
I feel like it’s some funny setting that I’m missing, but I’ve spent a TON of time trying to figure it out… help…? anyone…?

FYI it’s a jpg (with a white background) and it happens (thought smaller) on other image blocks too
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