Investigating: v0 preview doesn't match Vercel deployment

[amyegan]

Starting this thread to collect cases where the v0 preview works, but the site looks different or breaks when deployed to Vercel.

If you have encountered this, please reply with a chat URL or ID (the numbers/letters at the end of the URL). You do not need to make your chat public.

If you can share the deployment URL, that can help us find project info more quickly. Supporting screenshots are also appreciated

[shihpakhung-7440 (Clarity 7440)]

@amyegan

Seeing a pattern where v0 previews look fine, but live Vercel deployments initiated via v0 result in broken CSS/layouts, even when deploying previously stable code. This points to a potential v0 build/deployment pipeline issue that might be affecting multiple users.

V0 big problem with deploying

so i built a website it deosnt have any problems preview i test everything is fine but when i deploy it, its only shows the HTML i spend nearly 20bux on fixing that but its still the same and i reverted to the previous versions where i didnt have any problems and it was deployed before now it only shows th HTML [Screenshot 2025-06-03 113624] [Screenshot 2025-06-03 113605] HELP PLEASE

Deployed Site Layout Crashed on Vercel – Works Fine in v0 Preview

Hi everyone, I’m facing a persistent and puzzling layout crash issue with my Next.js (v14.1.0) website, https://www.hongkongdryeyecentre.com/, which is deployed on Vercel. The UI was largely generated using v0.dev and styled with Tailwind CSS. The Problem: The layout on my live deployed production site is severely crashed (styles seem missing or broken, elements are misaligned). Key Observations & Symptoms: Works in v0 Preview: The layout looks perfectly normal and as expected in the v0.dev…

Tailwindcss incosistant files

Hey, I wanted to ask about a bug (or a feature I don’t know) that is happening when I push my files to github or download them in zip. The problem is it’s using Tailwindcss v4, but when I download its zip or push to github we have all of these files at the same time : styles/globals.css tailwind.config.ts app/globals.css It’s like having both tailwindcss v4 and v3 at the same time and they interfere with eachother And when I run this on my local enviroment I get various errors such as : @…

Deploying upgrade from v0 to Vercel is breaking

When I deploy, it’s breaking the CSS on my pages. I tested on two of my accounts and both showed the same error during deployment. How can I fix this?

Perhaps Vercel should take a look?

[amyegan]

Thanks @shihpakhung-7440. We had all of these reports individually, but I appreciate you recognizing the pattern and listing them together. I opened a new thread to collect related reports and moved your post here.

Please post more links here if you see other cases of this

[andresmgf-8382 (andresmgf)]

is it only me having the issue that code changes are not neither affecting the preview nor the deployment??? Is the hep experience with Vercel this horrible? how is actually helping?

[amyegan]

Can you share screenshots to show us what you see?

[andresmgf-8382 (andresmgf)]

No changes either manual or by the ai are being rendered in the preview nor deployed when deploying. The code is there and changed and nothing is happening.

[nguyen-4766 (Nguyen Guidify)]

here is my site in preview mode

and what i see on production mode

I tried to add v0 to fix, but affter v0 fixed i still see the grey color in prview mode not the same in production mode. it’s weird.