diff --git a/src/ui/PropertyBrowser/qtworkspaceattribute.cpp b/src/ui/PropertyBrowser/qtworkspaceattribute.cpp
index f374558d..d4b7f89f 100644
--- a/src/ui/PropertyBrowser/qtworkspaceattribute.cpp
+++ b/src/ui/PropertyBrowser/qtworkspaceattribute.cpp
@@ -14,15 +14,18 @@
 
 QWorkspaceAttribute::QWorkspaceAttribute(class WorkSpace* workspace) 
     : workspace_(workspace) {
-
+    if (workspace_) {
+        filesSeq_ = workspace_->GetFilesSeq();
+    }
 }
 
 bool QWorkspaceAttribute::operator==(const QWorkspaceAttribute& other) {
-    return workspace_ == other.workspace_;
+    return workspace_ == other.workspace_ && filesSeq_ == other.filesSeq_;
 }
 
 QWorkspaceAttribute& QWorkspaceAttribute::operator=(const QWorkspaceAttribute& other) {
     workspace_ = other.workspace_;
+    filesSeq_ = other.filesSeq_;
     return *this;
 }
 
diff --git a/src/ui/PropertyBrowser/qtworkspaceattribute.h b/src/ui/PropertyBrowser/qtworkspaceattribute.h
index e274565b..397a3ccc 100644
--- a/src/ui/PropertyBrowser/qtworkspaceattribute.h
+++ b/src/ui/PropertyBrowser/qtworkspaceattribute.h
@@ -45,6 +45,7 @@
 #include <osg/Vec3>
 #include "workspace/FileEntry.h"
 #include <vector>
+#include <cstdint>
 
 class QWorkspaceAttribute {
 public:
@@ -86,6 +87,8 @@ public:
     QString GetFileEntryAbsPath(FileEntryType type, int index) const;
 private:
     class WorkSpace* workspace_{ nullptr };
+    // Snapshot of workspace files change sequence to detect mutations
+    std::uint64_t filesSeq_{ 0 };
 };
 
 
diff --git a/src/workspace/WorkSpace.cpp b/src/workspace/WorkSpace.cpp
index 72cc419b..a0a40b01 100644
--- a/src/workspace/WorkSpace.cpp
+++ b/src/workspace/WorkSpace.cpp
@@ -134,6 +134,7 @@ WorkSpace::FileEntryResult WorkSpace::CreateFileEntry(FileEntryType type) {
     }
     // push a placeholder; actual filename may be set elsewhere via SetWavePath/SetRDPath/etc
     vec.push_back(FileEntry{ type, QString() });
+    ++filesSeq_;
     // Notify listeners (e.g., PropertyBrowser) to refresh workspace properties
     emit FilesChanged(type);
     return FileEntryResult::Ok;
@@ -154,6 +155,7 @@ bool WorkSpace::SetFileEntryCount(FileEntryType type, int count) {
     } else {
         vec.resize(count);
     }
+    ++filesSeq_;
     emit FilesChanged(type);
     return true;
 }
@@ -177,6 +179,7 @@ bool WorkSpace::SetFileEntryPath(FileEntryType type, int index, const QString& p
         return false;
     }
     vec[index].fileName = fileInfo.fileName();
+    ++filesSeq_;
     emit FilesChanged(type);
     return true;
 }
diff --git a/src/workspace/WorkSpace.h b/src/workspace/WorkSpace.h
index 39a7f1eb..80208e62 100644
--- a/src/workspace/WorkSpace.h
+++ b/src/workspace/WorkSpace.h
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <map>
+#include <cstdint>
 #include <QObject>
 
 #include <osgEarth/Viewpoint>
@@ -162,13 +163,17 @@ private:
 	osgEarth::Viewpoint homeViewpoint_;
 
 	bool leaded_{ false };
-	std::vector<class Entity*> entities_;
-	OEScene* scene_{ nullptr };
-	class Timestep* timestep_{ nullptr };
-	class LampStatus* lampStatus_{ nullptr }; 	
-	class Entity* trackedEntity_{ nullptr };
+    std::vector<class Entity*> entities_;
+    OEScene* scene_{ nullptr };
+    class Timestep* timestep_{ nullptr };
+    class LampStatus* lampStatus_{ nullptr }; 
+    class Entity* trackedEntity_{ nullptr };
     // Stored as file entries under workspace dir, keyed by type
     std::map<FileEntryType, std::vector<FileEntry>> files_;
+    // Monotonic sequence for file entries changes, used to trigger UI refresh
+    std::uint64_t filesSeq_{ 0 };
+public:
+    std::uint64_t GetFilesSeq() const { return filesSeq_; }
 	friend class WorkSpaceXMLWrite;
 };