bg-opacity doesn't work on dark mode

[exxsy]

What version of Tailwind CSS are you using?

v3.0.24

What version of Node.js are you using?

v21.0.0

What browser are you using?

Chrome, Firefox Nightly

What operating system are you using?

Windows

Reproduction URL

https://play.tailwindcss.com/DpTJBw8PNW

Describe your issue

I am working with .bg-opacity & opacity for transition & such,
But tailwind does not apply that bg-opacity for dark mode, if you remove the dark: prefix it works well.