diff --git a/src/activities/reader/EpubReaderActivity.cpp b/src/activities/reader/EpubReaderActivity.cpp
index 426a836..6cc7a89 100644
--- a/src/activities/reader/EpubReaderActivity.cpp
+++ b/src/activities/reader/EpubReaderActivity.cpp
@@ -386,15 +386,15 @@ void EpubReaderActivity::loop() {
         [this](QuickMenuAction action) {
           // Cache values before exitActivity
           EpubReaderActivity* self = this;
-          GfxRenderer& cachedRenderer = renderer;
-          MappedInputManager& cachedMappedInput = mappedInput;
-          const Section* cachedSection = section.get();
           SemaphoreHandle_t cachedMutex = renderingMutex;
           
           exitActivity();
           
           if (action == QuickMenuAction::DICTIONARY) {
-            // Open dictionary menu
+            // Open dictionary menu - cache renderer/input for this scope
+            GfxRenderer& cachedRenderer = self->renderer;
+            MappedInputManager& cachedMappedInput = self->mappedInput;
+            const Section* cachedSection = self->section.get();
             self->enterNewActivity(new DictionaryMenuActivity(
                 cachedRenderer, cachedMappedInput,
                 [self](DictionaryMode mode) {