error fixed (when loading pages in single column mode.) (#4746)

app/javascript/mastodon/features/ui/components/columns_area.js

@@ -48,19 +48,32 @@ export default class ColumnsArea extends ImmutablePureComponent {
   }
 
   componentDidMount() {
+    if (!this.props.singleColumn) {
       this.node.addEventListener('wheel', this.handleWheel,  detectPassiveEvents ? { passive: true } : false);
+    }
     this.lastIndex = getIndex(this.context.router.history.location.pathname);
     this.setState({ shouldAnimate: true });
   }
 
-  componentDidUpdate() {
+  componentWillUpdate(nextProps) {
+    if (this.props.singleColumn !== nextProps.singleColumn && nextProps.singleColumn) {
+      this.node.removeEventListener('wheel', this.handleWheel);
+    }
+  }
+
+  componentDidUpdate(prevProps) {
+    if (this.props.singleColumn !== prevProps.singleColumn && !this.props.singleColumn) {
+      this.node.addEventListener('wheel', this.handleWheel,  detectPassiveEvents ? { passive: true } : false);
+    }
     this.lastIndex = getIndex(this.context.router.history.location.pathname);
     this.setState({ shouldAnimate: true });
   }
 
   componentWillUnmount () {
+    if (!this.props.singleColumn) {
       this.node.removeEventListener('wheel', this.handleWheel);
     }
+  }
 
   handleChildrenContentChange() {
     if (!this.props.singleColumn) {