inset-shadow-[spec1,spec2] renders all but the first shadow spec outset, not inset

[tremby]

What version of Tailwind CSS are you using?

v4.0.17 in my app, v4.11 in "Tailwind Play"

What build tool (or framework if it abstracts the build tool) are you using?

Next.js 15.2.4 but n/a

What version of Node.js are you using?

v20.10.0 but n/a

What browser are you using?

Firefox but affects all

What operating system are you using?

Linux but affects all

Reproduction URL

https://play.tailwindcss.com/gI32O7VLv6

Describe your issue

I would expect inset-shadow-[shadowspec1,shadowspec2] to render 2 inset shadows, but in fact all but the first are rendered as outer shadows.

In my reproduction the second shadow is red, and should appear inside the element on the right side, but it appears outside the element on the left side.

I can work around it by adding inset_ at the start of the 2nd (and further) shadow specs, such as with inset-shadow-[shadowspec1,inset_shadowspec2]

[philipp-spiess]

Thanks for the report! @wongjn already submitted a fix for this which we'll include in the next patch release later today 👍