Index: wp-content/themes/twentynineteen/style-editor.css
===================================================================
--- wp-content/themes/twentynineteen/style-editor.css	(revision 54300)
+++ wp-content/themes/twentynineteen/style-editor.css	(working copy)
@@ -1005,7 +1005,7 @@
 
 /** === Button === */
 .wp-block-button .wp-block-button__link {
-  line-height: 1.8;
+  line-height: inherit;
   font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
   font-size: 0.88889em;
   font-weight: bold;
Index: wp-content/themes/twentynineteen/style-editor.scss
===================================================================
--- wp-content/themes/twentynineteen/style-editor.scss	(revision 54300)
+++ wp-content/themes/twentynineteen/style-editor.scss	(working copy)
@@ -381,7 +381,7 @@
 .wp-block-button {
 
 	.wp-block-button__link {
-		line-height: 1.8;
+		line-height:inherit;
 		@include font-family( $font__heading );
 		font-size: $font__size-sm;
 		font-weight: bold;
Index: wp-content/themes/twentynineteen/style-rtl.css
===================================================================
--- wp-content/themes/twentynineteen/style-rtl.css	(revision 54300)
+++ wp-content/themes/twentynineteen/style-rtl.css	(working copy)
@@ -5492,7 +5492,7 @@
   border: none;
   font-size: 0.88889em;
   font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
-  line-height: 1.2;
+  line-height: inherit;
   box-sizing: border-box;
   font-weight: bold;
   text-decoration: none;
Index: wp-content/themes/twentynineteen/style.css
===================================================================
--- wp-content/themes/twentynineteen/style.css	(revision 54300)
+++ wp-content/themes/twentynineteen/style.css	(working copy)
@@ -5504,7 +5504,7 @@
   border: none;
   font-size: 0.88889em;
   font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
-  line-height: 1.2;
+  line-height: inherit;
   box-sizing: border-box;
   font-weight: bold;
   text-decoration: none;