diff --git a/Client/udpstreamer/static/app.js b/Client/udpstreamer/static/app.js
index d23f7c0..42c2783 100644
--- a/Client/udpstreamer/static/app.js
+++ b/Client/udpstreamer/static/app.js
@@ -3533,7 +3533,9 @@ function refreshVScaleMenu() {
   if (focused !== scaleEl) scaleEl.value = cal.scale;
   if (focused !== offsetEl) offsetEl.value = cal.offset;
   if (focused !== unitEl) unitEl.value = cal.unit;
-  [scaleEl, offsetEl, unitEl].forEach(el => el.classList.remove('cal-invalid'));
+  [scaleEl, offsetEl, unitEl].forEach(el => {
+    if (focused !== el) el.classList.remove('cal-invalid');
+  });
   const srcLabel = srcLabelForKey(_vsMenuKey);
   const usable = srcLabel !== '' && base !== '';
   [scaleEl, offsetEl, unitEl, document.getElementById('btn-cal-reset')]