diff --git a/Sources/Other/CollectionReuseViewManager.swift b/Sources/Other/CollectionReuseViewManager.swift
index a337a8e..1ee6675 100644
--- a/Sources/Other/CollectionReuseViewManager.swift
+++ b/Sources/Other/CollectionReuseViewManager.swift
@@ -40,6 +40,9 @@ public class CollectionReuseViewManager: NSObject {
     } else {
       reusableViews[identifier] = [view]
     }
+    if let collectionView = view as? CollectionView {
+      collectionView.provider = nil
+    }
     if let cleanupTimer = cleanupTimer {
       cleanupTimer.fireDate = Date().addingTimeInterval(lifeSpan)
     } else {
diff --git a/Sources/Provider/FlattenedProvider.swift b/Sources/Provider/FlattenedProvider.swift
index a5d36f4..e373828 100644
--- a/Sources/Provider/FlattenedProvider.swift
+++ b/Sources/Provider/FlattenedProvider.swift
@@ -70,7 +70,7 @@ struct FlattenedProvider: ItemProvider {
   func identifier(at: Int) -> String {
     let (sectionIndex, item) = indexPath(at)
     if let sectionData = childSections[sectionIndex].sectionData {
-      return provider.identifier(at: sectionIndex) + sectionData.identifier(at: item)
+      return provider.identifier(at: sectionIndex) + "-" + sectionData.identifier(at: item)
     } else {
       return provider.identifier(at: sectionIndex)
     }