code review

vector/src/main/java/im/vector/app/features/matrixto/MatrixToBottomSheet.kt

@@ -57,7 +57,7 @@ class MatrixToBottomSheet :
         injector.inject(this)
     }
 
-    var weakReference = WeakReference<InteractionListener>(null)
+    private var weakReference = WeakReference<InteractionListener>(null)
 
     var interactionListener: InteractionListener?
         set(value) {

vector/src/main/java/im/vector/app/features/spaces/SpaceExploreActivity.kt

@@ -57,6 +57,13 @@ class SpaceExploreActivity : VectorBaseActivity<ActivitySimpleBinding>(), SpaceD
             }
             super.onFragmentAttached(fm, f, context)
         }
+
+        override fun onFragmentDetached(fm: FragmentManager, f: Fragment) {
+            if (f is MatrixToBottomSheet) {
+                f.interactionListener = null
+            }
+            super.onFragmentDetached(fm, f)
+        }
     }
 
     override fun onCreate(savedInstanceState: Bundle?) {