[Autocomplete] TextField with InputProps breaks the listbox from displaying

[sdornan]

• 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 😯

Customizing an Autocomplete's TextField with InputProps breaks the listbox from displaying. Version 4.6.0 did not exhibit this behavior.

Expected Behavior 🤔

The listbox should display.

Steps to Reproduce 🕹

https://codesandbox.io/s/material-demo-275b2?fontsize=14

Context 🔦

Your Environment 🌎

Tech	Version
Material-UI	v4.6.1

[oliviertassinari]

@sdornan The behavior has changed in #18289. It's important to deep merge the params:

    <Autocomplete
      id="combo-box-demo"
      options={top100Films}
      getOptionLabel={option => option.title}
      style={{ width: 300 }}
      renderInput={params => (
        <TextField
          {...params}
          InputProps={{ ...params.InputProps, style: { fontSize: 24 } }}
          label="Combo box"
          variant="outlined"
          fullWidth
        />
      )}
    />