Hi @Kyli Gur,
Is this happening in a specific inbox (like Outlook, Gmail, Apple Mail, ect)? In general, inboxes all render emails in different ways, and there’s a chance that the inbox that you’re viewing this email in is rendering our HTML incorrectly. When Klaviyo sends an email to an inbox, it sends over the HTML that determines how the inbox will look, and then the inbox does have some freedom in how they render it.
That being said, I’m happy to look further into why this may be happening and see if there are any steps we can take to make this less likely to happen in the future! Would you mind sending over a couple screenshots? One screenshot of how the button should look on desktop, and one of the style settings you have for the button (border, padding, ect)? That will help me determine why this may be happening.