fix(FEC-11038): decorator API called with incorrect this(proxy) instead of the activeDecorator

src/engines/engine-decorator.js

@@ -30,8 +30,16 @@ class EngineDecorator extends FakeEventTarget implements IEngineDecorator {
           return this._listeners;
         }
         const activeDecorator = this._pluginDecorators.find(decorator => decorator.active);
-        // $FlowFixMe
-        return activeDecorator && prop in activeDecorator ? activeDecorator[prop] : obj[prop];
+        const isGetter = (object, property) => {
+          const descriptor = Object.getOwnPropertyDescriptor(object, property);
+          return descriptor && !!descriptor['get'];
+        };
+        const target = activeDecorator && prop in activeDecorator ? activeDecorator : obj;
+        return isGetter(target.constructor.prototype, prop)
+          ? // $FlowFixMe
+            target[prop]
+          : // $FlowFixMe
+            (...args) => target[prop](...args);
       },
       set: (obj, prop, value) => {
         const activeDecorator = this._pluginDecorators.find(decorator => prop in decorator && decorator.active);

src/player.js

@@ -1700,8 +1700,7 @@ export default class Player extends FakeEventTarget {
       this._appendEngineEl();
     } else {
       if (this._engine.id === Engine.id) {
-        // The restoring must be done by the engine itself not by the proxy (engine decorator if exists) to make sure the engine events fired by the engine itself.
-        this._engine.restore.call(this._engine._engine || this._engine, source, this._config);
+        this._engine.restore.call(this._engine, source, this._config);
       } else {
         this._engine.destroy();
         this._createEngine(Engine, source);