diff --git a/examples/lock-app/silabs/include/LockManager.h b/examples/lock-app/silabs/include/LockManager.h
index 7345782d69..4316fe62a3 100644
--- a/examples/lock-app/silabs/include/LockManager.h
+++ b/examples/lock-app/silabs/include/LockManager.h
@@ -199,10 +199,12 @@ class LockManager
 private:
     struct UnlatchContext
     {
+        static constexpr uint8_t kMaxPinLength = UINT8_MAX;
+        uint8_t mPinBuffer[kMaxPinLenght];
+        uint8_t mPinLength;
         chip::EndpointId mEndpointId;
         Nullable<chip::FabricIndex> mFabricIdx;
         Nullable<chip::NodeId> mNodeId;
-        Optional<chip::ByteSpan> mPin;
         OperationErrorEnum mErr;
 
         void Update(chip::EndpointId endpointId, const Nullable<chip::FabricIndex> & fabricIdx,
@@ -211,8 +213,18 @@ class LockManager
             mEndpointId = endpointId;
             mFabricIdx  = fabricIdx;
             mNodeId     = nodeId;
-            mPin        = pin;
             mErr        = err;
+
+            if (pin.HasValue())
+            {
+                memcpy(mPinBuffer, pin.Value().data(), pin.Value().size());
+                mPinLength = static_cast<uint8_t>(pin.Value().size());
+            }
+            else
+            {
+                memset(mPinBuffer, 0, kMaxPinLenght);
+                mPinLength = 0;
+            }
         }
     };
     UnlatchContext mUnlatchContext;
@@ -242,11 +254,7 @@ class LockManager
     uint8_t mCredentialData[kNumCredentialTypes][kMaxCredentials][kMaxCredentialSize];
     CredentialStruct mCredentials[kMaxUsers][kMaxCredentials];
 
-    static LockManager sLock;
     EFR32DoorLock::LockInitParams::LockParam LockParams;
 };
 
-inline LockManager & LockMgr()
-{
-    return LockManager::sLock;
-}
+LockManager & LockMgr();
diff --git a/examples/lock-app/silabs/src/LockManager.cpp b/examples/lock-app/silabs/src/LockManager.cpp
index 04527e53ac..8ad82dafb9 100644
--- a/examples/lock-app/silabs/src/LockManager.cpp
+++ b/examples/lock-app/silabs/src/LockManager.cpp
@@ -25,11 +25,18 @@
 #include <cstring>
 #include <lib/support/logging/CHIPLogging.h>
 
-LockManager LockManager::sLock;
-
 using namespace ::chip::DeviceLayer::Internal;
 using namespace EFR32DoorLock::LockInitParams;
 
+namespace {
+    LockManager sLock;
+} // namespace
+
+LockManager & LockMgr()
+{
+    return sLock;
+}
+
 CHIP_ERROR LockManager::Init(chip::app::DataModel::Nullable<chip::app::Clusters::DoorLock::DlLockState> state, LockParam lockParam)
 {
 
@@ -258,7 +265,7 @@ void LockManager::UnlockAfterUnlatch()
     if (mUnlatchContext.mEndpointId != kInvalidEndpointId)
     {
         succes = setLockState(mUnlatchContext.mEndpointId, mUnlatchContext.mFabricIdx, mUnlatchContext.mNodeId,
-                              DlLockState::kUnlocked, mUnlatchContext.mPin, mUnlatchContext.mErr);
+                              DlLockState::kUnlocked, MakeOptional(chip::ByteSpan(mUnlatchContext.mPinBuffer, mUnlatchContext.mPinLength)), mUnlatchContext.mErr);
     }
 
     if (!succes)