[Autocomplete] onOpen callback invoked twice

• The issue is present in the latest release.
• I have searched the issues of this repository and believe that this is not a duplicate.

Current Behavior 😯

I’m using @material-ui/lab v4.0.0-alpha.36. It seems that onOpen callback of Autocomplete components is getting invoked twice when clicking into field.

Example of the component usage:

<Autocomplete
      value={props.value}
      options={props.options}
      loading={props.loading}
      multiple={props.multiple}
      renderInput={params => (
        <TextField
          {...params}
          fullWidth
          name={props.name}
          label={props.label}
          onBlur={props.onBlur}
          InputProps={{
            ...params.InputProps,
            endAdornment: (
              <>
                {props.loading ? <CircularProgress color="inherit" size={20} /> : null}
                {params.InputProps.endAdornment}
              </>
            ),
          }}
        />
      )}
      onOpen={() => console.log('on open')} <-- this is printed twice
      onChange={handleChange}
      getOptionLabel={option => option.label}
      getOptionSelected={(option, value) => option.value === value}
    />

Expected Behavior 🤔

onOpen callback should be invoked only once.

Steps to Reproduce 🕹

Steps:

1. Use Autocomplete component.
2. Provide onOpen callback.
3. Click into the field.
4. See that onOpen invoked twice.

Context 🔦

Your Environment 🌎

Tech	Version
Material-UI	v4.0.0-alpha.36
React	v16.12.0
Browser	Chrome
TypeScript	-
etc.

[oliviertassinari]

I have added the waiting for users upvotes tag. I’m closing the issue as we are not sure it’s important. So please upvote this issue if you are. We will prioritize our effort based on the number of upvotes.

[oliviertassinari]

Please provide a minimal reproduction test case. This would help a lot 👷 . A live example would be perfect. This codesandbox.io template may be a good starting point. Thank you!