Clicking on Print icon, changes icon to empty button in Safari

When clicking on the print icon, the print icon changes to empty square button with no text. This only happens in safari not chrome.

## Expected Behavior
Should render and function correctly as in Chrome.

## Current Behavior
Chrome works fine.
Safari as listed below.

## Steps to Reproduce (for bugs)
1. https://codesandbox.io/s/zealous-newton-t1x1e in Safari
2. click on print icon bittpm
3. icon box is redrawn as empty button
4. any following clicks on the tool bar, causes each of the buttons to go the an empty button.

## Your Environment
| Tech | Version |
|--------------|---------|
| Material-UI | 4.10.0 |
| MUI-datatables | 3.7.6 |
| React | 16.13.0 |
| browser | Safari |
| etc | https://codesandbox.io/s/zealous-newton-t1x1e |