diff --git a/resources/assets/js/annotations/components/annotationCanvas.vue b/resources/assets/js/annotations/components/annotationCanvas.vue
index ae1f6c34a..09a2fe119 100644
--- a/resources/assets/js/annotations/components/annotationCanvas.vue
+++ b/resources/assets/js/annotations/components/annotationCanvas.vue
@@ -524,14 +524,6 @@ export default {
                         });
                         return;
                     }
-
-                    let curatedPointSet = this.removeDuplicatedPoints(points);
-                    if (points.length !== curatedPointSet.length) {
-                        points = curatedPointSet;
-                        // link polygon start and end by adding polygon start at the end
-                        points.push(points[0]); // x coordinate
-                        points.push(points[1]); // y coordinate
-                    }
                 }
 
                 e.feature.set('color', this.selectedLabel.color);
@@ -557,24 +549,10 @@ export default {
         },
         isInvalidPolygon(e) {
             let geometry = e.feature.getGeometry();
-            let points = geometry.getCoordinates();
-            return this.getPointStringSet(points[0]).size < 3;
+            let points = geometry.getCoordinates()[0];
+            return (new Set(points.map(xy => String([xy])))).size < 3;
             
         },
-        removeDuplicatedPoints(points) {
-            let x = points.filter((_,i) => i%2==0);
-            let y = points.filter((_,i) => i%2==1);
-            let coordinates = x.map((xi,i) => {return [xi,y[i]];});
-
-            let pointStringSet = Array.from(this.getPointStringSet(coordinates));
-            return pointStringSet.map(xy => this.convertStringToPoint(xy)).flat();
-        },
-        getPointStringSet(points) {
-            return new Set(points.map(xy => String([xy])));
-        },
-        convertStringToPoint(xy) {
-            return xy.split(',').map(Number);
-        },
         deleteSelectedAnnotations() {
             if (!this.modifyInProgress && this.hasSelectedAnnotations && confirm('Are you sure you want to delete all selected annotations?')) {
                 this.$emit('delete', this.selectedAnnotations);
diff --git a/resources/assets/js/annotations/ol/MagicWandInteraction.js b/resources/assets/js/annotations/ol/MagicWandInteraction.js
index 78c4784b5..338be9b40 100644
--- a/resources/assets/js/annotations/ol/MagicWandInteraction.js
+++ b/resources/assets/js/annotations/ol/MagicWandInteraction.js
@@ -195,7 +195,8 @@ class MagicWandInteraction extends PointerInteraction {
         if (this.isShowingCross) {
             this.sketchSource.removeFeature(this.sketchFeature);
         } else {
-            this.dispatchEvent({type: 'drawend', feature: this.sketchFeature});
+            this.filterSketchCoordinates();
+            this.dispatchEvent({ type: 'drawend', feature: this.sketchFeature });
         }
 
         this.sketchFeature = null;
@@ -375,6 +376,78 @@ class MagicWandInteraction extends PointerInteraction {
             }
         }
     }
+
+    /**
+    * Removes duplicated points and dangeling lines
+    */
+    filterSketchCoordinates() {
+        let points = this.sketchFeature.getGeometry().getCoordinates()[0];
+        points = this.removeDuplicatedPoints(points);
+        points = this.removeDangelingLines(points);
+        points.push(points[0]);
+        this.sketchFeature.getGeometry().setCoordinates([points]);
+    }
+
+    /**
+    * Removes duplicated points
+    */
+    removeDuplicatedPoints(points) {
+        let pointStringSet = Array.from(new Set(points.map(xy => String([xy]))));
+        return pointStringSet.map(xy => xy.split(',').map(Number));
+    }
+
+    /*
+    * Removes dangeling lines by deleting middle point of three subsequent points with equal x or y values
+    */
+    removeDangelingLines(coordinates) {
+        // filter by x values
+        let i = 0;
+        let endNotReached = true;
+        while (endNotReached) {
+            try {
+                if (coordinates[i][0] === coordinates[i + 1][0]) {
+                    if (coordinates[i + 1][0] === coordinates[i + 2][0]) {
+                        coordinates.splice(i + 1, 1)
+                        if (coordinates[i + 1][0] !== coordinates[i + 2][0]) {
+                            i++;
+                        }
+                    } else {
+                        i++;
+                    }
+                } else {
+                    i++;
+                }
+            } catch (err) {
+                break;
+            }
+            endNotReached = i < coordinates.length - 2;
+        };
+
+        // filter by y values
+        i = 0;
+        endNotReached = true;
+        while (endNotReached) {
+            try {
+                if (coordinates[i][1] === coordinates[i + 1][1]) {
+                    if (coordinates[i + 1][1] === coordinates[i + 2][1]) {
+                        coordinates.splice(i + 1, 1)
+                        if (coordinates[i + 1][1] !== coordinates[i + 2][1]) {
+                            i++;
+                        }
+                    } else {
+                        i++;
+                    }
+                } else {
+                    i++;
+                }
+            } catch (err) {
+                break;
+            }
+            endNotReached = i < coordinates.length - 2;
+        };
+
+        return coordinates;
+    }
 }
 
 export default MagicWandInteraction;