From d5015b12740b02277f151e32e5f122cbdf069d9b Mon Sep 17 00:00:00 2001
From: Fernando Montoya <montogeek@gmail.com>
Date: Thu, 29 Oct 2020 19:22:24 +0100
Subject: [PATCH] [LinearProgress] Fix Safari's bug during composition of
 different paint (#23293)

---
 packages/material-ui/src/LinearProgress/LinearProgress.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/packages/material-ui/src/LinearProgress/LinearProgress.js b/packages/material-ui/src/LinearProgress/LinearProgress.js
index 5de6b6d81e4d12..23404c389fa752 100644
--- a/packages/material-ui/src/LinearProgress/LinearProgress.js
+++ b/packages/material-ui/src/LinearProgress/LinearProgress.js
@@ -21,6 +21,7 @@ export const styles = (theme) => {
       position: 'relative',
       overflow: 'hidden',
       height: 4,
+      zIndex: 0, // Fix Safari's bug during composition of different paint.
       '@media print': {
         colorAdjust: 'exact',
       },