[mirotalksfu] - fix

public/css/GroupChat.css

@@ -1,6 +1,8 @@
 .container {
     padding: 2px !important;
-    transition: width 0.5s !important;
+    transition:
+        width 0.5s,
+        background 2s ease !important;
     /* overflow-y: auto;
     overflow-x: hidden; */
 }