[Stack] Doesn't reset margin on first item

[rational-kunal]

Duplicates

• I have searched the existing issues

Latest version

• I have tested the latest version

Steps to reproduce 🕹

Link to live example: https://codesandbox.io/s/sad-aj-45wiii?file=/src/App.js

import Stack from "@mui/material/Stack";
import FormControlLabel from "@mui/material/FormControlLabel";
import Switch from "@mui/material/Switch";

export default function App() {
  return (
    <Stack direction="column" spacing={1}>
      <FormControlLabel
        value="Auto Seek"
        control={<Switch color="primary" />}
        label="Auto skip intro"
      />
      <FormControlLabel
        value="Auto Seek"
        control={<Switch color="primary" />}
        label="Auto skip intro"
      />
      <FormControlLabel
        value="Auto Seek"
        control={<Switch color="primary" />}
        label="Auto skip intro"
      />
    </Stack>
  );
}

Current behavior 😯

There is additional space in front of the first switch in the stack.

Expected behavior 🤔

All the switch elements should be perfectly aligned.

Context 🔦

No response

Your environment 🌎

npx @mui/envinfo

  System:
    OS: macOS 13.3.1
  Binaries:
    Node: 19.8.1 - /opt/homebrew/bin/node
    Yarn: Not Found
    npm: 9.5.1 - /opt/homebrew/bin/npm
  Browsers:
    Chrome: 113.0.5672.126
    Edge: Not Found
    Firefox: Not Found
    Safari: 16.4
  npmPackages:
    @emotion/react: ^11.11.0 => 11.11.0
    @emotion/styled: ^11.11.0 => 11.11.0
    @mui/base:  5.0.0-beta.2
    @mui/core-downloads-tracker:  5.13.2
    @mui/icons-material: ^5.11.16 => 5.11.16
    @mui/material: ^5.13.2 => 5.13.2
    @mui/private-theming:  5.13.1
    @mui/styled-engine:  5.13.2
    @mui/system:  5.13.2
    @mui/types:  7.2.4
    @mui/utils:  5.13.1
    @types/react: ^18.0.14 => 18.2.6
    react: ^18.2.0 => 18.2.0
    react-dom: ^18.2.0 => 18.2.0

[hbjORbj]

It indeed seems like a bug. I will investigate.

[gitstart]

@hbjORbj @rational-kunal I would like to pick this up

[oliviertassinari]

@rational-kunal Note that you can use useFlexGap to workaround the problem: https://mui.com/system/react-stack/#flexbox-gap

https://codesandbox.io/s/amazing-framework-fss8w6?file=/src/App.js

We will likely make this the default in the next major version (the only downside is no support for negative spacing).