diff --git a/dist/iwmlib.js b/dist/iwmlib.js
index 968a683..57617e6 100644
--- a/dist/iwmlib.js
+++ b/dist/iwmlib.js
@@ -2995,11 +2995,16 @@
             }
         }
 
+        _throwDeltaTime() {
+            let t = performance.now();
+            let dt = t - this.lastframe;
+            this.lastframe = t;
+            return dt
+        }
+
         animateThrow(time) {
             if (this.velocity != null) {
-                let t = performance.now();
-                let dt = t - this.lastframe;
-                this.lastframe = t;
+                let dt = this._throwDeltaTime();
                 // console.log("animateThrow", dt)
                 let next = this.nextVelocity(this.velocity);
                 let prevLength = Points.length(this.velocity);
diff --git a/dist/iwmlib.pixi.js b/dist/iwmlib.pixi.js
index 968cf84..c1268aa 100644
--- a/dist/iwmlib.pixi.js
+++ b/dist/iwmlib.pixi.js
@@ -6159,11 +6159,16 @@
             }
         }
 
+        _throwDeltaTime() {
+            let t = performance.now();
+            let dt = t - this.lastframe;
+            this.lastframe = t;
+            return dt
+        }
+
         animateThrow(time) {
             if (this.velocity != null) {
-                let t = performance.now();
-                let dt = t - this.lastframe;
-                this.lastframe = t;
+                let dt = this._throwDeltaTime();
                 // console.log("animateThrow", dt)
                 let next = this.nextVelocity(this.velocity);
                 let prevLength = Points.length(this.velocity);
@@ -7796,6 +7801,9 @@
         }
     }
 
+    /* ES Lint  */
+    /* globals PIXI, console*/
+
     const registeredTiles = new Map();
     const pendingTiles = new Map();
     /** Implements a baseTexture cache. The last textures are kept for reuse  */
@@ -7936,18 +7944,18 @@
          * @param {*} options  Part of the PIXI API, but ignored in the implementation
          * @memberof Tile
          */
-        destroy(options, debug = true) {
+        destroy(options, debug = false) {
             let count = this.unregister();
 
             if (keepTextures > 0) {
-                keptTextures.push({ url: this.url, texture: this.texture});
+                keptTextures.push({ url: this.url, texture: this.texture });
 
                 let opts = { children: true, texture: false, baseTexture: false };
                 if (debug) console.log("Tile.destroy", registeredTiles.size, opts);
                 super.destroy(opts);
 
-                while(keptTextures.length > keepTextures) {
-                    let {url, texture} = keptTextures.shift(); 
+                while (keptTextures.length > keepTextures) {
+                    let { url, texture } = keptTextures.shift();
                     if (Tile.isObsolete(url)) {
                         texture.destroy(true); // Destroy base as well
                         if (debug) console.log("Destroying texture and baseTexture", url);
@@ -8995,6 +9003,7 @@
                 : 1;
             this.alpha = alpha;
             this.fastLoads = 0;
+            this.active = true;
             this.autoLoadTiles = autoLoadTiles;
             this.minimumLevel = minimumLevel;
             this.quadTrees = new Map(); // url as keys, TileQuadNodes as values
@@ -9266,7 +9275,7 @@
         }
 
         worldBounds() {
-            let viewBounds = this.app.scene.getBounds();
+            let viewBounds = this.app.scene.bounds; // UO: Never use getBounds()
             // Using getBounds extends visible scope after loading tiles and leads
             // to excessive loading
             if (this.world != null) {
@@ -9648,6 +9657,9 @@
          * @param {boolean} debug - log debug infos
          */
         transformed(event) {
+            if (!this.active) {
+                return
+            }
             let key = this.currentLevel.toString();
             let currentTiles = this.tileLayers[key];
             if (typeof currentTiles == 'undefined') {
@@ -9670,7 +9682,7 @@
                 this.ensureTiles(this.currentLevel, event.about);
                 return
             }
-            
+
             let level = this.levelForScale(event.scale);
             let newLevel = Math.max(level, this.minimumLevel);
             if (newLevel != this.currentLevel) {
@@ -9695,6 +9707,7 @@
        * @memberof DeepZoomImage
        */
         activate() {
+            this.active = true;
             this.destroyTilesAboveLevel(this.currentLevel);
             this.ensureTiles(this.currentLevel, null);
             //console.log("Activate Textures!", this.currentLevel)
@@ -9706,16 +9719,14 @@
        * @memberof DeepZoomImage
        */
         deactivate() {
+            this.active = false;
             this.destroyAllTiles();
-            Object.keys(this.tileLayers).forEach(key => {
-                this.destroyTiles(key);
-            });
             this.tileContainer.destroy({ children: true });
             printTileCacheInfos();
         }
 
         throwFinished() {
-            console.log("throwFinished");
+            //console.log("throwFinished")
             let key = this.currentLevel.toString();
             let currentTiles = this.tileLayers[key];
             if (typeof currentTiles == 'undefined') {
diff --git a/lib/pixi/deepzoom/image.js b/lib/pixi/deepzoom/image.js
index c03efc3..acbf223 100755
--- a/lib/pixi/deepzoom/image.js
+++ b/lib/pixi/deepzoom/image.js
@@ -364,6 +364,7 @@ export class DeepZoomImage extends PIXI.Container {
             : 1
         this.alpha = alpha
         this.fastLoads = 0
+        this.active = true
         this.autoLoadTiles = autoLoadTiles
         this.minimumLevel = minimumLevel
         this.quadTrees = new Map() // url as keys, TileQuadNodes as values
@@ -1017,6 +1018,9 @@ export class DeepZoomImage extends PIXI.Container {
      * @param {boolean} debug - log debug infos
      */
     transformed(event) {
+        if (!this.active) {
+            return
+        }
         let key = this.currentLevel.toString()
         let currentTiles = this.tileLayers[key]
         if (typeof currentTiles == 'undefined') {
@@ -1064,6 +1068,7 @@ export class DeepZoomImage extends PIXI.Container {
    * @memberof DeepZoomImage
    */
     activate() {
+        this.active = true
         this.destroyTilesAboveLevel(this.currentLevel)
         this.ensureTiles(this.currentLevel, null)
         //console.log("Activate Textures!", this.currentLevel)
@@ -1075,6 +1080,7 @@ export class DeepZoomImage extends PIXI.Container {
    * @memberof DeepZoomImage
    */
     deactivate() {
+        this.active = false
         this.destroyAllTiles()
         this.tileContainer.destroy({ children: true })
         printTileCacheInfos()
diff --git a/lib/pixi/deepzoom/tile.js b/lib/pixi/deepzoom/tile.js
index 3ac08ff..15d85ad 100644
--- a/lib/pixi/deepzoom/tile.js
+++ b/lib/pixi/deepzoom/tile.js
@@ -1,3 +1,5 @@
+/* ES Lint  */
+/* globals PIXI, console*/
 
 const registeredTiles = new Map()
 const pendingTiles = new Map()
diff --git a/lib/scatter.js b/lib/scatter.js
index 0f2a1cb..ba5a4a0 100644
--- a/lib/scatter.js
+++ b/lib/scatter.js
@@ -173,11 +173,16 @@ class Throwable {
         }
     }
 
+    _throwDeltaTime() {
+        let t = performance.now()
+        let dt = t - this.lastframe
+        this.lastframe = t
+        return dt
+    }
+
     animateThrow(time) {
         if (this.velocity != null) {
-            let t = performance.now()
-            let dt = t - this.lastframe
-            this.lastframe = t
+            let dt = this._throwDeltaTime()
             // console.log("animateThrow", dt)
             let next = this.nextVelocity(this.velocity)
             let prevLength = Points.length(this.velocity)