diff --git a/src/devices/Tca955x/Tca955x.cs b/src/devices/Tca955x/Tca955x.cs
index 53978f53ad..bf98169bb8 100644
--- a/src/devices/Tca955x/Tca955x.cs
+++ b/src/devices/Tca955x/Tca955x.cs
@@ -646,24 +646,27 @@ protected override bool IsPinModeSupported(int pinNumber, PinMode mode) =>
         /// <inheritdoc/>
         protected override void Dispose(bool disposing)
         {
-            _controller?.UnregisterCallbackForPinValueChangedEvent(_interrupt, InterruptHandler);
-            _interruptPending = false;
+            if (disposing)
+            {
+                _controller?.UnregisterCallbackForPinValueChangedEvent(_interrupt, InterruptHandler);
+                _interruptPending = false;
 
-            // Make a copy of the task refernce to avoid a race condition
-            // between checking it for null and then waiting on it.
-            var localinterruptProcessingTask = _interruptProcessingTask;
-            localinterruptProcessingTask?.Wait();
+                // Make a copy of the task reference to avoid a race condition
+                // between checking it for null and then waiting on it.
+                var localinterruptProcessingTask = _interruptProcessingTask;
+                localinterruptProcessingTask?.Wait();
 
-            if (_shouldDispose)
-            {
-                _controller?.Dispose();
-            }
+                if (_shouldDispose)
+                {
+                    _controller?.Dispose();
+                }
 
-            _controller = null;
+                _controller = null;
 
-            _busDevice?.Dispose();
+                _busDevice?.Dispose();
+            }
 
-            base.Dispose(true);
+            base.Dispose(disposing);
         }
     }