Index: src/wp-admin/css/edit.css
===================================================================
--- src/wp-admin/css/edit.css	(revision 60917)
+++ src/wp-admin/css/edit.css	(working copy)
@@ -1420,6 +1420,15 @@
 	width: 180px;
 }
 
+:where(.columns-2 #postbox-container-1) .tagsdiv .ajaxtag {
+	display: flex;
+}
+
+:where(.columns-2 #postbox-container-1) .ajaxtag .newtag {
+	width: auto;
+	flex: 1;
+}
+
 .tagsdiv .the-tags {
 	display: block;
 	height: 60px;
@@ -1909,6 +1918,10 @@
 	}
 
 	/* Tags Metabox */
+	.tagsdiv .ajaxtag {
+		display: block;
+	}
+
 	.tagsdiv .newtag {
 		width: 100%;
 		height: auto;