diff --git a/src/app/components/add-task/add-task.component.html b/src/app/components/add-task/add-task.component.html
index 25d68ea..3a3e5ec 100644
--- a/src/app/components/add-task/add-task.component.html
+++ b/src/app/components/add-task/add-task.component.html
@@ -1,5 +1,8 @@
 <section
-  [ngStyle]="{ 'background-color': overlayData !== '' ? 'var(--white)' : '' }"
+  [ngStyle]="{
+    'background-color':
+      !overlayMobile && overlayData !== '' ? 'var(--white)' : ''
+  }"
 >
   <div
     class="headline"
diff --git a/src/app/components/add-task/add-task.component.ts b/src/app/components/add-task/add-task.component.ts
index b538625..fa663e8 100644
--- a/src/app/components/add-task/add-task.component.ts
+++ b/src/app/components/add-task/add-task.component.ts
@@ -73,7 +73,9 @@ export class AddTaskComponent {
   routeParams() {
     if (this.route.params.subscribe()) {
       this.route.params.subscribe((params) => {
-        this.taskData.status = params['id'];
+        if (params['id']) {
+          this.taskData.status = params['id'];
+        }
       });
     }
   }
@@ -124,12 +126,12 @@ export class AddTaskComponent {
   }
 
   deleteSubtask(subtaskName: string) {
-    this.taskData.subtasksTitle.splice(
-      this.taskData.subtasksTitle.indexOf(subtaskName),
-      1
-    );
-    this.taskData.subtasksDone.splice(1);
-    this.saveTaskData();
+    const index = this.taskData.subtasksTitle.indexOf(subtaskName);
+    if (index !== -1) {
+      this.taskData.subtasksTitle.splice(index, 1);
+      this.taskData.subtasksDone.splice(index, 1);
+      this.saveTaskData();
+    }
   }
 
   searchTask(): void {