Describe the bug

I have a project in library mode that exports a component. Said component uses @mui/material package and consists of the following:

    <Tooltip title={'some title'}>
      <Grid container direction="column" alignItems="center">
        <span >{"some text"}</span>
      </Grid>
    </Tooltip>

If I run the library as standalone project, I get no errors. If I build in development mode vite build --mode development and install the package on another project, I get no errors. But if I build in production mode vite build then when I import it on the other project I get the following warning on console:

Each child in a list should have a unique "key" prop...

Adding a random key to <Grid> component and building for production also removes the warning.

This is not the only situation where this warning pops up, I have at least 3 and they are hard to track. This is just an example I could isolate.

I am also not sure if the error is related to Vite or to Mui.

Reproduction

I created a minimal reproducible example, with instructions:

https://github.com/Vallo/vite-library-mode-unique-key-bug

System Info

System:
    OS: Linux 5.4 Ubuntu 20.04.3 LTS (Focal Fossa)
    CPU: (12) x64 Intel(R) Core(TM) i7-8750H CPU @ 2.20GHz
    Memory: 11.58 GB / 31.22 GB
    Container: Yes
    Shell: 5.0.17 - /bin/bash
  Binaries:
    Node: 12.22.1 - ~/.nvm/versions/node/v12.22.1/bin/node
    Yarn: 1.22.4 - /usr/bin/yarn
    npm: 8.1.3 - ~/.nvm/versions/node/v12.22.1/bin/npm
  Browsers:
    Chromium: 95.0.4638.69
    Firefox: 94.0

Used Package Manager

npm

Logs

No response

Validations

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• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Make sure this is a Vite issue and not a framework-specific issue. For example, if it's a Vue SFC related bug, it should likely be reported to https://github.com/vuejs/vue-next instead.
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• The provided reproduction is a minimal reproducible example of the bug.