Return directly when all we do is render queued images

src/ol/renderer/canvas/VectorTileLayer.js

@@ -27,7 +27,7 @@ import {
   makeInverse
 } from '../../transform.js';
 import CanvasExecutorGroup, {replayDeclutter} from '../../render/canvas/ExecutorGroup.js';
-import {clear} from '../../obj.js';
+import {clear, isEmpty} from '../../obj.js';
 
 
 /**
@@ -432,6 +432,11 @@ class CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {
       return this.container_;
     }
 
+    if (!isEmpty(this.renderTileImageQueue_) && !this.extentChanged) {
+      this.renderTileImages_(hifi, frameState);
+      return this.container_;
+    }
+
     const context = this.overlayContext_;
     const declutterReplays = layer.getDeclutter() ? {} : null;
     const source = layer.getSource();