From 6783f6adb93f1b89c07896916c3ff8b1a8dfbb8a Mon Sep 17 00:00:00 2001
From: ahocevar <andreas.hocevar@gmail.com>
Date: Sat, 22 Jun 2019 18:57:28 +0200
Subject: [PATCH] Handle container reuse properly when layers are added/removed

---
 src/ol/renderer/canvas/VectorTileLayer.js | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/ol/renderer/canvas/VectorTileLayer.js b/src/ol/renderer/canvas/VectorTileLayer.js
index 75f864cb7c..8bd84485e0 100644
--- a/src/ol/renderer/canvas/VectorTileLayer.js
+++ b/src/ol/renderer/canvas/VectorTileLayer.js
@@ -129,12 +129,9 @@ class CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {
     }
     const containerReused = this.containerReused;
     super.useContainer(target, transform, opacity);
-    if (containerReused && !this.containerReused && !overlayContext) {
-      this.overlayContext_ = null;
-      this.overlayContextUid_ = undefined;
-    }
-    if (this.containerReused && overlayContext) {
-      this.overlayContext_ = overlayContext;
+    if (containerReused) {
+      this.overlayContext_ = overlayContext || null;
+      this.overlayContextUid_ = overlayContext ? getUid(overlayContext) : undefined;
     }
     if (!this.overlayContext_) {
       const overlayContext = createCanvasContext2D();