diff --git a/apps/openmw/mwmechanics/aipackage.cpp b/apps/openmw/mwmechanics/aipackage.cpp
index 1532cce018..ac72068263 100644
--- a/apps/openmw/mwmechanics/aipackage.cpp
+++ b/apps/openmw/mwmechanics/aipackage.cpp
@@ -140,7 +140,7 @@ bool MWMechanics::AiPackage::pathTo(const MWWorld::Ptr& actor, const osg::Vec3f&
             if (wasShortcutting || doesPathNeedRecalc(dest, actor.getCell())) // if need to rebuild path
             {
                 const auto playerHalfExtents = world->getHalfExtents(world->getPlayerPtr());
-                mPathFinder.buildPath(position, dest, actor.getCell(), getPathGridGraph(actor.getCell()),
+                mPathFinder.buildPath(actor, position, dest, actor.getCell(), getPathGridGraph(actor.getCell()),
                     playerHalfExtents, getNavigatorFlags(actor));
                 mRotateOnTheRunChecks = 3;
 
diff --git a/apps/openmw/mwmechanics/aiwander.cpp b/apps/openmw/mwmechanics/aiwander.cpp
index e0822e8063..ad11f6d4e9 100644
--- a/apps/openmw/mwmechanics/aiwander.cpp
+++ b/apps/openmw/mwmechanics/aiwander.cpp
@@ -161,8 +161,8 @@ namespace MWMechanics
             {
                 const auto world = MWBase::Environment::get().getWorld();
                 const auto playerHalfExtents = world->getHalfExtents(world->getPlayerPtr());
-                mPathFinder.buildPath(pos.asVec3(), mDestination, actor.getCell(), getPathGridGraph(actor.getCell()),
-                    playerHalfExtents, getNavigatorFlags(actor));
+                mPathFinder.buildPath(actor, pos.asVec3(), mDestination, actor.getCell(),
+                    getPathGridGraph(actor.getCell()), playerHalfExtents, getNavigatorFlags(actor));
             }
 
             if (mPathFinder.isPathConstructed())
@@ -323,7 +323,7 @@ namespace MWMechanics
             {
                 const auto world = MWBase::Environment::get().getWorld();;
                 const auto playerHalfExtents = world->getHalfExtents(world->getPlayerPtr());
-                mPathFinder.buildPath(currentPosition, destinationPosition, actor.getCell(),
+                mPathFinder.buildPath(actor, currentPosition, destinationPosition, actor.getCell(),
                     getPathGridGraph(actor.getCell()), playerHalfExtents, getNavigatorFlags(actor));
                 mPathFinder.addPointToPath(destinationPosition);
 
diff --git a/apps/openmw/mwmechanics/pathfinding.cpp b/apps/openmw/mwmechanics/pathfinding.cpp
index cfa51c226b..01c417b536 100644
--- a/apps/openmw/mwmechanics/pathfinding.cpp
+++ b/apps/openmw/mwmechanics/pathfinding.cpp
@@ -12,6 +12,7 @@
 #include "../mwbase/environment.hpp"
 
 #include "../mwworld/cellstore.hpp"
+#include "../mwworld/class.hpp"
 
 #include "pathgrid.hpp"
 #include "coordinateconverter.hpp"
@@ -275,14 +276,14 @@ namespace MWMechanics
         mConstructed = true;
     }
 
-    void PathFinder::buildPath(const osg::Vec3f& startPoint, const osg::Vec3f& endPoint,
+    void PathFinder::buildPath(const MWWorld::ConstPtr& actor, const osg::Vec3f& startPoint, const osg::Vec3f& endPoint,
         const MWWorld::CellStore* cell, const PathgridGraph& pathgridGraph, const osg::Vec3f& halfExtents,
         const DetourNavigator::Flags flags)
     {
         mPath.clear();
         mCell = cell;
 
-        buildPathByNavigatorImpl(startPoint, endPoint, halfExtents, flags, std::back_inserter(mPath));
+        buildPathByNavigatorImpl(actor, startPoint, endPoint, halfExtents, flags, std::back_inserter(mPath));
 
         if (mPath.empty())
             buildPathByPathgridImpl(startPoint, endPoint, pathgridGraph, std::back_inserter(mPath));
@@ -290,8 +291,8 @@ namespace MWMechanics
         mConstructed = true;
     }
 
-    void PathFinder::buildPathByNavigatorImpl(const osg::Vec3f& startPoint, const osg::Vec3f& endPoint,
-        const osg::Vec3f& halfExtents, const DetourNavigator::Flags flags,
+    void PathFinder::buildPathByNavigatorImpl(const MWWorld::ConstPtr& actor, const osg::Vec3f& startPoint,
+        const osg::Vec3f& endPoint, const osg::Vec3f& halfExtents, const DetourNavigator::Flags flags,
         std::back_insert_iterator<std::deque<osg::Vec3f>> out)
     {
         try
@@ -302,7 +303,10 @@ namespace MWMechanics
         catch (const DetourNavigator::NavigatorException& exception)
         {
             DetourNavigator::log("PathFinder::buildPathByNavigator navigator exception: ", exception.what());
-            Log(Debug::Warning) << "Build path by navigator exception: " << exception.what();
+            Log(Debug::Verbose) << "Build path by navigator exception: \"" << exception.what()
+                << "\" for \"" << actor.getClass().getName(actor) << "\" (" << actor.getBase()
+                << ") from " << startPoint << " to " << endPoint << " with flags ("
+                << DetourNavigator::WriteFlags {flags} << ")";
         }
     }
 }
diff --git a/apps/openmw/mwmechanics/pathfinding.hpp b/apps/openmw/mwmechanics/pathfinding.hpp
index 1a35ef792e..567056fa5d 100644
--- a/apps/openmw/mwmechanics/pathfinding.hpp
+++ b/apps/openmw/mwmechanics/pathfinding.hpp
@@ -12,6 +12,7 @@
 namespace MWWorld
 {
     class CellStore;
+    class ConstPtr;
 }
 
 namespace MWMechanics
@@ -74,7 +75,7 @@ namespace MWMechanics
             void buildPathByPathgrid(const osg::Vec3f& startPoint, const osg::Vec3f& endPoint,
                 const MWWorld::CellStore* cell, const PathgridGraph& pathgridGraph);
 
-            void buildPath(const osg::Vec3f& startPoint, const osg::Vec3f& endPoint,
+            void buildPath(const MWWorld::ConstPtr& actor, const osg::Vec3f& startPoint, const osg::Vec3f& endPoint,
                 const MWWorld::CellStore* cell, const PathgridGraph& pathgridGraph, const osg::Vec3f& halfExtents,
                 const DetourNavigator::Flags flags);
 
@@ -180,8 +181,8 @@ namespace MWMechanics
             void buildPathByPathgridImpl(const osg::Vec3f& startPoint, const osg::Vec3f& endPoint,
                 const PathgridGraph& pathgridGraph, std::back_insert_iterator<std::deque<osg::Vec3f>> out);
 
-            void buildPathByNavigatorImpl(const osg::Vec3f& startPoint, const osg::Vec3f& endPoint,
-                const osg::Vec3f& halfExtents, const DetourNavigator::Flags flags,
+            void buildPathByNavigatorImpl(const MWWorld::ConstPtr& actor, const osg::Vec3f& startPoint,
+                const osg::Vec3f& endPoint, const osg::Vec3f& halfExtents, const DetourNavigator::Flags flags,
                 std::back_insert_iterator<std::deque<osg::Vec3f>> out);
     };
 }
diff --git a/components/detournavigator/flags.hpp b/components/detournavigator/flags.hpp
index f52c0faf5a..df22209bbb 100644
--- a/components/detournavigator/flags.hpp
+++ b/components/detournavigator/flags.hpp
@@ -1,6 +1,8 @@
 #ifndef OPENMW_COMPONENTS_DETOURNAVIGATOR_FLAGS_H
 #define OPENMW_COMPONENTS_DETOURNAVIGATOR_FLAGS_H
 
+#include <ostream>
+
 namespace DetourNavigator
 {
     using Flags = unsigned short;
@@ -12,6 +14,49 @@ namespace DetourNavigator
         Flag_swim = 1 << 1,
         Flag_openDoor = 1 << 2,
     };
+
+    inline std::ostream& operator <<(std::ostream& stream, const Flag value)
+    {
+        switch (value) {
+            case Flag_none:
+                return stream << "none";
+            case Flag_walk:
+                return stream << "walk";
+            case Flag_swim:
+                return stream << "swim";
+            case Flag_openDoor:
+                return stream << "openDoor";
+        }
+    }
+
+    struct WriteFlags
+    {
+        Flags mValue;
+
+        friend inline std::ostream& operator <<(std::ostream& stream, const WriteFlags& value)
+        {
+            if (value.mValue == Flag_none)
+            {
+                return stream << Flag_none;
+            }
+            else
+            {
+                bool first = true;
+                for (const auto flag : {Flag_walk, Flag_swim, Flag_openDoor})
+                {
+                    if (value.mValue & flag)
+                    {
+                        if (!first)
+                            stream << " | ";
+                        first = false;
+                        stream << flag;
+                    }
+                }
+
+                return stream;
+            }
+        }
+    };
 }
 
 #endif