Appbar color changing to white on selecting input from <Field component={select}

[Harsh Agarwal]

I have included a select component as follow

<Field
    component={TextField}
    type="text"
    select={true}
    align="left"
    fullWidth
    size="small"
    margin="dense"
    variant="outlined"
    name="doctor"
    >
    <MenuItem value={10}>X</MenuItem>
    <MenuItem value={15}>Y</MenuItem>
    <MenuItem value={20}>Z</MenuItem>
</Field>

But on selecting an input from the select dropdown, my Material-UI Appbar color is changing. I have attached the before and after screenshots below.

Before:

After:

This is using Material-UI v5.0.0-rc.0

@cliedeman

[Harsh Agarwal]

This issue resolved when I migrated formik-material-ui code locally to Material-Ui@v5.0.0 using this.
Apparently using Material UI v4 and v5 together was the issue.