Grid column start and end generating `grid-column:` css properties

[aihowes]

What version of Tailwind CSS are you using?

4.1.13

What build tool (or framework if it abstracts the build tool) are you using?
vite: 7.1.5
@tailwindcss/vite: 4.1.13

What version of Node.js are you using?
22

What browser are you using?

Arc
Version 1.110.0 (67696)
Chromium Engine Version 139.0.7258.156

What operating system are you using?

MacOS 15.6.1

Reproduction URL

Tailwind v3: https://play.tailwindcss.com/GIiEGJMv62?file=config

Tailwind v4: https://play.tailwindcss.com/nMNvsPlHa2?file=css

Describe your issue

We use a custom grid template columns with named grid lines for example

--grid-template-columns-content: [container-start content-start]
    repeat(12, [column-start] minmax(0, 100px) [column-end]) [content-end
    container-end];

We then setup utility classes for each named grid line so was can specifically say col-start-col-4 col-end-col-8

In V4 creating a --grid-column-end-col-8 variable seems to be generating the grid-column AND the grid-column-end css property, whilst V3 as we use gridColumnEnd JS property just creates the grid-column-end css property.