ModalController disables SideMenu

In my APP I am navigating between pages with the NavController.

That works fine and as it should, but I have cases in which I want to redirect to the start page.
For this I used ModalController:

 //Redirect to other Feedbacks
let modal = this.modalCtrl.create(FeedbackPage);

When I do it like this and I am redirected to this page the Button for the side menu of navcontroller is disabled:

The next time i redirect to the Page the button disapears:

Does anybody know how i can redirect WITHOUT NavController?
Or how I can solve this Problem?

Because I dont want that the user needs to press this button to come back to the Page:

i hope you have to put this html line but not sure.

        <button ion-button menuToggle>
      <ion-icon name="menu"></ion-icon>

Thank you.

This is my Code from the feedback.html (the site where it should be redirected to)

      <button ion-button menuToggle>
        <ion-icon name="menu"></ion-icon>
    <h3>Dein Feedback ist uns Wichtig!</h3>

      <button ion-item *ngFor="let item of feedbacks" (click)="openMenu($event, item)">
        <p [ngClass]='item.done' item-end>{{item.done}}</p>

So as you can see I already implemented it