В App Bar с кнопками material-ui/core’: v3.9.1 обрезка backgroundImage

В App Bar с кнопками material-ui/core': v3.9.1 обрезка backgroundImage.

В App Bar с кнопками material-ui/core':v3.0.3 все работало хорошо

Почему? Что можно поцарапать, чтобы работало как в v3.0.3. Мой код:

//https://material-ui.com/api/app-bar/ (Панель приложения с кнопками)

    import React from "react";
    import PropTypes from "prop-types";
    import { withStyles } from "@material-ui/core/styles";
    import AppBar from "@material-ui/core/AppBar";
    import Toolbar from "@material-ui/core/Toolbar";
    import Typography from "@material-ui/core/Typography";
    import Button from "@material-ui/core/Button";
    import IconButton from "@material-ui/core/IconButton";
    import { Link } from "react-router-dom";
    import MenuIcon from "@material-ui/icons/Menu";

    import logoRa from "../assets/images/all/SunRa48.png";

    const styles = {
      root: {
        flexGrow: 1,
      },
      grow: {
        flexGrow: 1,
      },
      menuButton: {
        marginLeft: -12,
        marginRight: 20,
      },
      logo: {
        backgroundImage: `url(${logoRa})`,
        backgroundSize: 45,
        backgroundPosition: "2px 2px",
        backgroundRepeat: "no-repeat",
        borderRadius: "0%",
        marginRight: 10,
      },
    };

    function ButtonAppBar(props) {
      const { classes } = props;
      return (
        <div className = {classes.root}>
          <AppBar position = "static">
            <Toolbar>
              <IconButton className = {classes.menuButton} color = "inherit" aria-label = "Menu">
                <MenuIcon />
              </IconButton>
              <IconButton className = {classes.logo} component = {Link} to = "/aboutme" title = "AboutMe" aria-label = "logo" />
              <Typography variant = "h6" color = "inherit" className = {classes.grow}>
                News
              </Typography>
              <Button color = "inherit">Login</Button>
            </Toolbar>
          </AppBar>
        </div>
      );
    }

    ButtonAppBar.propTypes = {
      classes: PropTypes.object.isRequired,
    };
export default withStyles(styles)(ButtonAppBar);