Ticket #47414: 47414.diff

src/wp-content/themes/twentyeleven/editor-blocks.css

@@ -382 +382 @@
         text-shadow: 0 -1px 0 rgba(0,0,0,0.3);
 }
 
+.wp-block-button .wp-block-button__link[data-is-placeholder-visible=true] {
+    height: auto;
+}
+
 .wp-block-button__link {
         background: #222;
         color: #eee;

src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css

@@ -726 +726 @@
         white-space: nowrap;
 }
 
+.wp-block-button .wp-block-button__link[data-is-placeholder-visible=true] {
+    height: auto;
+}
+
 .wp-block-button__link {
         background-color: #222;
         color: #fff;