I'm facing an anomalous behavior in a project where two separate deploys render the same header with different layouts, even though:

- the component is exactly the same,

- the image asset is in the same path,

- no CSS differences exist in the codebase,

and none of the elements were modified between deploys.

The odd part is that, although these are distinct apps (separate deploys), the header code is identical. However, the screenshots show:

- horizontal displacement of the logo,

- variation in the absolute positioning of the switcher,

- changes in the overall header height.

There were no changes to the CSS, Tailwind config, or the component itself.

I’d like to understand whether anyone has encountered similar layout inconsistencies across identical deploys, and what factors might cause this kind of divergence. Among the hypotheses considered: image processing differences from next/image, font rendering discrepancies in the build environment, hydration mismatches, platform-level cache resolving different Tailwind/Next internal versions, or the recent upgrade to Next 16.0.7.

If anyone can share diagnostic approaches or known root causes for similar issues, it would be greatly appreciated.