diff --git a/app/scodoc/sco_cache.py b/app/scodoc/sco_cache.py
index 4ccfb7481..94f954095 100644
--- a/app/scodoc/sco_cache.py
+++ b/app/scodoc/sco_cache.py
@@ -225,15 +225,18 @@ class NotesTableCache(ScoDocCache):
         # try REDIS
         key = cls._get_key(formsemestre_id)
         nt = CACHE.get(key)
-        if nt or not compute:
+        if nt:
+            g.nt_cache[formsemestre_id] = nt  # cache locally (same request)
             return nt
-        # Recompute asked table:
+        if not compute:
+            return None
+        # Recompute requested table:
         from app.scodoc import notes_table
 
         t0 = time.time()
         nt = notes_table.NotesTable(formsemestre_id)
         t1 = time.time()
-        _ = cls.set(formsemestre_id, nt)
+        _ = cls.set(formsemestre_id, nt)  # cache in REDIS
         t2 = time.time()
         log(f"cached formsemestre_id={formsemestre_id} ({(t1-t0):g}s +{(t2-t1):g}s)")
         g.nt_cache[formsemestre_id] = nt