diff --git a/source/backend/engine/CarlaEngineInternal.cpp b/source/backend/engine/CarlaEngineInternal.cpp
index 05979eb26..2c247fac7 100644
--- a/source/backend/engine/CarlaEngineInternal.cpp
+++ b/source/backend/engine/CarlaEngineInternal.cpp
@@ -782,7 +782,8 @@ ScopedActionLock::ScopedActionLock(CarlaEngine* const engine,
       #ifndef CARLA_OS_WASM
        #if defined(DEBUG) || defined(BUILD_BRIDGE)
         // block wait for unlock on processing side
-        carla_stdout(ACTION_MSG_PREFIX "ScopedPluginAction(%i) - blocking START", pluginId);
+        carla_stdout(ACTION_MSG_PREFIX "ScopedPluginAction(%i|%i:%s) - blocking START",
+                     pluginId, action, EnginePostAction2Str(action));
        #endif
 
         if (! pData->nextAction.postDone)
@@ -808,7 +809,8 @@ ScopedActionLock::ScopedActionLock(CarlaEngine* const engine,
         }
 
        #if defined(DEBUG) || defined(BUILD_BRIDGE)
-        carla_stdout(ACTION_MSG_PREFIX "ScopedPluginAction(%i) - blocking DONE", pluginId);
+        carla_stdout(ACTION_MSG_PREFIX "ScopedPluginAction(%i|%i:%s) - blocking DONE",
+                     pluginId, action, EnginePostAction2Str(action));
        #endif
       #endif
 
diff --git a/source/backend/engine/CarlaEngineInternal.hpp b/source/backend/engine/CarlaEngineInternal.hpp
index 40d723d1d..69568db06 100644
--- a/source/backend/engine/CarlaEngineInternal.hpp
+++ b/source/backend/engine/CarlaEngineInternal.hpp
@@ -203,6 +203,27 @@ enum EnginePostAction {
 #endif
 };
 
+static inline
+const char* EnginePostAction2Str(const EnginePostAction action)
+{
+    switch (action)
+    {
+    case kEnginePostActionNull:
+        return "kEnginePostActionNull";
+    case kEnginePostActionZeroCount:
+        return "kEnginePostActionZeroCount";
+#ifndef BUILD_BRIDGE_ALTERNATIVE_ARCH
+    case kEnginePostActionRemovePlugin:
+        return "kEnginePostActionRemovePlugin";
+    case kEnginePostActionSwitchPlugins:
+        return "kEnginePostActionSwitchPlugins";
+#endif
+    }
+
+    carla_stderr("CarlaBackend::EnginePostAction2Str(%i) - invalid action", action);
+    return nullptr;
+}
+
 struct EngineNextAction {
     EnginePostAction opcode;
     uint pluginId;