Ticket #56175: 56175.2.patch

wp-content/themes/twentytwenty/assets/css/editor-style-block-rtl.css

@@ -1019 +1019 @@
         margin-top: 15px;
 }
 
+@media (min-width: 600px){
+        .wp-block-latest-posts.columns-2 li {
+                width: calc(50% - 1em);
+        }
+}
+
 /* Block: Shortcode -------------------------- */
 
 .editor-styles-wrapper .wp-block-shortcode textarea {

wp-content/themes/twentytwenty/assets/css/editor-style-block.css

@@ -1019 +1019 @@
         margin-top: 15px;
 }
 
+@media (min-width: 600px){
+        .wp-block-latest-posts.columns-2 li {
+                width: calc(50% - 1em);
+        }
+}
+
 /* Block: Shortcode -------------------------- */
 
 .editor-styles-wrapper .wp-block-shortcode textarea {

wp-includes/blocks/latest-posts/style.css

@@ -100 +100 @@
 }
 @media (min-width: 600px) {
   .wp-block-latest-posts.columns-2 li {
-    width: calc((100% / 2) - 1.25em + (1.25em / 2));
+    width: calc(50% - 1em) !important;
   }
   .wp-block-latest-posts.columns-2 li:nth-child(2n) {
     margin-right: 0;