diff --git a/Sources/TableDirector.swift b/Sources/TableDirector.swift
index ecf798a..a0c0e9e 100644
--- a/Sources/TableDirector.swift
+++ b/Sources/TableDirector.swift
@@ -262,7 +262,9 @@ open class TableDirector: NSObject, UITableViewDataSource, UITableViewDelegate {
     @discardableResult
     open func clear() -> Self {
         
+        heightStrategy?.invalidate()
         sections.removeAll()
+
         return self
     }
 }