updates

src/core/css/grid.css

@@ -1049,6 +1049,7 @@ h2.block-title i {
 
 .no-wrap { white-space: nowrap; }
 .text-wrap { white-space: normal; }
+.text-spacing { line-height: 1.6; }
 
 .hidden {
 	position: absolute !important;

src/widgets/overlay/Overlay.js

@@ -65,12 +65,12 @@ export class Overlay {
 
 			const modalEl = ui.previousElementSibling;
 
+			if (!modalEl || !modalEl.classList.contains('sp-modal')) {
+				return;
+			}
+
 			modalEl.classList.add('hide-bg');
 
-			modalEl.addEventListener('animationend', function() {
-				this.remove();
-			}, {
-				once: true
-			});
+			modalEl.addEventListener('animationend', _ => modalEl.remove(), { once: true });
 		}
 	}