Fix layer selection bug by sorting hit-test by z-index

js/CanvasLayers.js

@@ -323,6 +323,8 @@ export class CanvasLayers {
         this.canvas.requestSaveState();
     }
     getLayerAtPosition(worldX, worldY) {
+        // Always sort by zIndex so topmost is checked first
+        this.canvas.layers.sort((a, b) => a.zIndex - b.zIndex);
         for (let i = this.canvas.layers.length - 1; i >= 0; i--) {
             const layer = this.canvas.layers[i];
             // Skip invisible layers