diff --git a/esphome/core/scheduler.h b/esphome/core/scheduler.h
index 5071144691..b48c130d78 100644
--- a/esphome/core/scheduler.h
+++ b/esphome/core/scheduler.h
@@ -282,8 +282,7 @@ class Scheduler {
 
   // Helper to mark matching items in a container as removed
   // Returns the number of items marked for removal
-  // For ESPHOME_THREAD_MULTI_NO_ATOMICS platforms, the caller must hold the scheduler lock before calling this
-  // function.
+  // IMPORTANT: Caller must hold the scheduler lock before calling this function.
   template<typename Container>
   size_t mark_matching_items_removed_(Container &container, Component *component, const char *name_cstr,
                                       SchedulerItem::Type type, bool match_retry) {
@@ -291,8 +290,8 @@ class Scheduler {
     for (auto &item : container) {
       // Skip nullptr items (can happen in defer_queue_ when items are being processed)
       // The defer_queue_ uses index-based processing: items are std::moved out but left in the
-      // vector as nullptr until cleanup. If cancel_item_locked_() is called from a callback during
-      // defer queue processing, it will iterate over these nullptr items. This check prevents crashes.
+      // vector as nullptr until cleanup. Even though this function is called with lock held,
+      // the vector can still contain nullptr items from the processing loop. This check prevents crashes.
       if (!item)
         continue;
       if (this->matches_item_(item, component, name_cstr, type, match_retry)) {