What package within Headless UI are you using?
@headlessui/react
What version of that package are you using?
v1.4.3
What browser are you using?
N/A
Reproduction URL
https://codesandbox.io/s/funny-field-zp1cie?file=/src/App.js
Describe your issue
When I have radio inputs inside a popover and I open the popover via the keyboard and tab to them, all the radio inputs have their tab index attribute set to zero. This inserts them into the tab order, which is not expected as groups of radio inputs are normally navigated using the arrows keys (as I'm sure you're aware). I guess this is more an annoyance than a bug.