diff --git a/app.js b/app.js
index 784d97d..11d29ed 100644
--- a/app.js
+++ b/app.js
@@ -712,6 +712,9 @@ document.addEventListener('DOMContentLoaded', async () => {
     function updateProximityLines() {
         proximityLinesLayer.clearLayers();
 
+        // Only show lines if the current variant layer is visible
+        if (!state.map.hasLayer(variantLayers[state.activeVariant])) return;
+
         // Filter turbines for current variant
         const currentVariantTurbines = state.turbines.filter(t => t.variant === state.activeVariant);
         if (currentVariantTurbines.length === 0) return;
@@ -1494,7 +1497,7 @@ document.addEventListener('DOMContentLoaded', async () => {
                             type: t.type,
                             rd: t.rd,
                             hh: t.hh,
-                            ksfAngle: t.ksfangle || t.ksfAngle
+                            ksfAngle: t.ksfangle ?? t.ksfAngle ?? 0
                         });
                     });
                     statusEl.innerText = `${dbTurbines.length} WEAs aus Datenbank geladen.`;