Fixed: Jumpbar after going back to artist index page

frontend/src/Author/Index/Posters/AuthorIndexPosters.js

@@ -100,7 +100,8 @@ class AuthorIndexPosters extends Component {
       columnCount: 1,
       posterWidth: 238,
       posterHeight: 238,
-      rowHeight: calculateRowHeight(238, null, props.isSmallScreen, {})
+      rowHeight: calculateRowHeight(238, null, props.isSmallScreen, {}),
+      scrollRestored: false
     };
 
     this._isInitialized = false;
@@ -122,7 +123,8 @@ class AuthorIndexPosters extends Component {
       width,
       columnWidth,
       columnCount,
-      rowHeight
+      rowHeight,
+      scrollRestored
     } = this.state;
 
     if (prevProps.sortKey !== sortKey ||
@@ -140,6 +142,11 @@ class AuthorIndexPosters extends Component {
       this._grid.recomputeGridSize();
     }
 
+    if (this._grid && scrollTop !== 0 && !scrollRestored) {
+      this.setState({ scrollRestored: true });
+      this._grid.scrollToPosition({ scrollTop });
+    }
+
     if (jumpToCharacter != null && jumpToCharacter !== prevProps.jumpToCharacter) {
       const index = getIndexOfFirstCharacter(items, jumpToCharacter);
 
@@ -152,10 +159,6 @@ class AuthorIndexPosters extends Component {
         });
       }
     }
-
-    if (this._grid && scrollTop !== 0) {
-      this._grid.scrollToPosition({ scrollTop });
-    }
   }
 
   //