Drain deferred FX parks before the view model is serialized; re-validate track handles per intent; pin the restore-plan round trip

src/shell/capture/render_in_place.cpp

@@ -22,6 +22,7 @@
 #include "shell/panel/panel_input.h"             // bankPanelTailSetting
 #include "shell/persist/session.h"
 #include "shell/view/view.h"                     // applyMode / mintManagedLanes
+#include "shell/view/view_fx_park.h"             // drainDeferredFxParks
 
 #define REAPERAPI_MINIMAL
 #define REAPERAPI_WANT_CountTrackMediaItems
@@ -210,6 +211,7 @@ void RunRenderTrackInPlace(ReaSamplerSession& session) {
     // Persist outside the block. The offline render's own save gate already forced a
     // saved project, so the Save-As-guarded persist the Design View actions need
     // cannot have anything to prompt for here.
+    drainDeferredFxParks();  // the reapply above may have deferred a restore — see the contract there
     session.saveToActiveProject();
 
     if (!placed) {