diff --git a/libs/util/include/psemek/util/behavior_tree.hpp b/libs/util/include/psemek/util/behavior_tree.hpp
index cf4b5ccd..1d83c288 100644
--- a/libs/util/include/psemek/util/behavior_tree.hpp
+++ b/libs/util/include/psemek/util/behavior_tree.hpp
@@ -111,8 +111,8 @@ namespace psemek::util
 
 			update_statistics update(Time dt)
 			{
-				activate();
 				fill_dt(dt);
+				activate();
 				wake_up(dt);
 
 				update_statistics result;
@@ -139,6 +139,7 @@ namespace psemek::util
 			{
 				for (auto & n : new_)
 				{
+					n.elapsed = 0;
 					std::apply([&](Args ... args){ n.node.start(args...); }, n.args);
 					active_.push_back(std::move(n));
 				}
@@ -195,9 +196,9 @@ namespace psemek::util
 			void start(Args ...)
 			{}
 
-			status update(Time, Args ... args)
+			status update(Time dt, Args ... args)
 			{
-				actionFn(args...);
+				actionFn(dt, args...);
 				return finished{true};
 			}
 
@@ -444,6 +445,7 @@ namespace psemek::util
 							current_started = true;
 						}
 						auto result = std::get<I>(children).update(dt, args...);
+						dt = 0;
 						if (auto f = std::get_if<finished>(&result))
 						{
 							if (f->result)
@@ -535,6 +537,7 @@ namespace psemek::util
 							current_started = true;
 						}
 						auto result = std::get<I>(children).update(dt, args...);
+						dt = 0;
 						if (auto f = std::get_if<finished>(&result))
 						{
 							if (!(f->result))