diff --git a/static/js/chart_controls.js b/static/js/chart_controls.js
index 58cfe28..876dc93 100644
--- a/static/js/chart_controls.js
+++ b/static/js/chart_controls.js
@@ -74,6 +74,8 @@ document.addEventListener("DOMContentLoaded", function () {
             this.textContent = "Pokaż całościowo";
             window.setCategorySplit(true);
         }
+        // odznaczenie wizualne zakresu 
+        document.querySelectorAll("#chartTab .range-btn").forEach(b => b.classList.remove("active"));
         reloadRespectingSplit();
     });
 
@@ -110,7 +112,10 @@ document.addEventListener("DOMContentLoaded", function () {
                 }
                 return;
             }
-            // monthly/quarterly/halfyearly/yearly – kubełkowanie po stronie backendu
+
+            if (startDateInput) startDateInput.value = "";
+            if (endDateInput) endDateInput.value = "";
+
             reloadRespectingSplit(r);
         });
     });