diff --git a/gui/qt6webdisplay/rootqt6.cpp b/gui/qt6webdisplay/rootqt6.cpp
index d3c28f76a83f0..8c833b4002296 100644
--- a/gui/qt6webdisplay/rootqt6.cpp
+++ b/gui/qt6webdisplay/rootqt6.cpp
@@ -72,10 +72,10 @@ class RQt6WebDisplayHandle : public RWebDisplayHandle {
    bool fDeleteView = true;       ///< is view must be deleted
 
    class Qt6Creator : public Creator {
-      QApplication *qapp{nullptr};  ///< created QApplication
-      int qargc{1};                 ///< arg counter
-      char *qargv[2];               ///< arg values
-      std::unique_ptr<TQt6Timer> fTimer; ///< timer to process ROOT events
+      QApplication *qapp = nullptr;        ///< created QApplication
+      int qargc = 1;                       ///< arg counter
+      char *qargv[2] = {nullptr, nullptr}; ///< arg values
+      std::unique_ptr<TQt6Timer> fTimer;   ///< timer to process ROOT events
       std::unique_ptr<RootUrlSchemeHandler> fHandler; ///< specialized handler
    public:
 
@@ -83,12 +83,16 @@ class RQt6WebDisplayHandle : public RWebDisplayHandle {
 
       ~Qt6Creator() override
       {
-         /** Code executed during exit and sometime crashes.
-          *  Disable it, while not clear if defaultProfile can be still used - seems to be not */
-         // if (fHandler)
-         //   QWebEngineProfile::defaultProfile()->removeUrlSchemeHandler(fHandler.get());
-
-         R__LOG_DEBUG(0, QtWebDisplayLog()) << "Deleting Qt6Creator";
+         /** Code executed during program exit and sometime crashes.
+          * It can be that ROOT libraries already partially unloaded
+          * Therefore disable objects cleanup when gSystem already vansihed */
+
+         if (!gSystem) {
+            fHandler.release();
+            fTimer.release();
+         } else  if (fHandler && QWebEngineProfile::defaultProfile()) {
+            QWebEngineProfile::defaultProfile()->removeUrlSchemeHandler(fHandler.get());
+         }
       }
 
       std::unique_ptr<RWebDisplayHandle> Display(const RWebDisplayArgs &args) override
@@ -112,7 +116,7 @@ class RQt6WebDisplayHandle : public RWebDisplayHandle {
          // create timer to process Qt events from inside ROOT process events
          // very much improve performance, even when Qt even loop runs by QApplication normally
          if (!fTimer && !args.IsHeadless()) {
-            Int_t interval = gEnv->GetValue("WebGui.Qt5Timer", 1);
+            Int_t interval = gEnv->GetValue("WebGui.Qt6Timer", 10);
             if (interval > 0) {
                fTimer = std::make_unique<TQt6Timer>(interval, kTRUE);
                fTimer->TurnOn();
diff --git a/gui/webdisplay/src/RWebWindowsManager.cxx b/gui/webdisplay/src/RWebWindowsManager.cxx
index db3457c9badb6..30319c4fdb933 100644
--- a/gui/webdisplay/src/RWebWindowsManager.cxx
+++ b/gui/webdisplay/src/RWebWindowsManager.cxx
@@ -786,7 +786,8 @@ std::string RWebWindowsManager::GetUrl(RWebWindow &win, bool remote, std::string
 ///      WebGui.LaunchTmout: time required to start process in seconds (default 30 s)
 ///      WebGui.ReconnectTmout: time to reconnect for already existing connection, if negative - no reconnecting possible (default 15 s)
 ///      WebGui.BatchTimeout: time required to produce images in headless (batch) mode (default 30 s)
-///      WebGui.CefTimer: periodic time to run CEF event loop (default 10 ms)
+///      WebGui.Qt6Timer: periodic timer to run Qt6 event loop, used with 'qt6' web display (default 10 ms)
+///      WebGui.CefTimer: periodic timer to run CEF event loop, used with 'cef' web display (default 10 ms)
 ///      WebGui.CefUseViews: "yes" - enable / "no" - disable usage of CEF views frameworks (default is platform/version dependent)
 ///      WebGui.OperationTmout: time required to perform WebWindow operation like execute command or update drawings
 ///      WebGui.RecordData: if specified enables data recording for each web window; "yes" or "no" (default)