src/util/qpolygon-utils.js

@@ -304,9 +304,19 @@ export function removeDuplicatePolygons(polygons) {
     }
   })
 
-  uniquePolygons = uniquePolygons.filter((polygon) => {
-    return isValidPoints(polygon)
-  })
+  //uniquePolygons중 isValidPoints의 조건을 만족하는 카운트 계산
+  const validCount = uniquePolygons.reduce((acc, polygon) => {
+    if (!isValidPoints(polygon)) {
+      return acc + 1
+    }
+    return acc
+  }, 0)
+
+  if (validCount > 1) {
+    uniquePolygons = uniquePolygons.filter((polygon) => {
+      return isValidPoints(polygon)
+    })
+  }
 
   return uniquePolygons
 }