Resolve "Very unusual back button behavior"

src/app/util/ion-back-button.directive.ts

@@ -1,59 +0,0 @@
-import {Directive, HostListener, Input, Optional} from '@angular/core';
-import {
-  AnimationBuilder,
-  Config,
-  IonBackButtonDelegate,
-  IonRouterOutlet,
-  NavController,
-} from '@ionic/angular';
-
-/**
- * Overrides the default ion-back-button directive.
- *
- * @see https://github.com/ionic-team/ionic-framework/blob/main/angular/src/directives/navigation/ion-back-button.ts
- */
-@Directive({
-  selector: 'ion-back-button',
-})
-export class IonBackButtonOverrideDirective {
-  @Input()
-  defaultHref: string | undefined | null;
-
-  @Input()
-  routerAnimation?: AnimationBuilder;
-
-  constructor(
-    @Optional() private routerOutlet: IonRouterOutlet,
-    private navCtrl: NavController,
-    private config: Config,
-    private ionBackButton: IonBackButtonDelegate,
-  ) {
-    this.ionBackButton.onClick = () => {
-      // Override default onClick to prevent double execution and errors
-    };
-  }
-
-  @HostListener('click', ['$event'])
-  onClick(event: Event): void {
-    const defaultHref =
-      this.defaultHref || this.config.get('backButtonDefaultHref');
-
-    // Handle back via angular navCtrl.back()
-    // (which is animated, instead of location.back)
-    if (defaultHref === '..') {
-      this.navCtrl.back();
-    } else if (this.routerOutlet?.canGoBack()) {
-      this.navCtrl.setDirection(
-        'back',
-        undefined,
-        undefined,
-        this.routerAnimation,
-      );
-      this.routerOutlet.pop();
-      event.preventDefault();
-    } else if (defaultHref != undefined) {
-      this.navCtrl.navigateBack(defaultHref, {animation: this.routerAnimation});
-      event.preventDefault();
-    }
-  }
-}

src/app/util/util.module.ts

@@ -21,7 +21,6 @@ import {DateFromIndexPipe} from './date-from-index.pipe';
 import {DaytimeKeyPipe} from './daytime-key.pipe';
 import {LazyPipe} from './lazy.pipe';
 import {NextDateInListPipe} from './next-date-in-list.pipe';
-import {IonBackButtonOverrideDirective} from './ion-back-button.directive';
 
 @NgModule({
   declarations: [
@@ -32,7 +31,6 @@ import {IonBackButtonOverrideDirective} from './ion-back-button.directive';
     DateFromIndexPipe,
     DaytimeKeyPipe,
     NextDateInListPipe,
-    IonBackButtonOverrideDirective,
   ],
   exports: [
     ArrayLastPipe,
@@ -42,7 +40,6 @@ import {IonBackButtonOverrideDirective} from './ion-back-button.directive';
     DateFromIndexPipe,
     DaytimeKeyPipe,
     NextDateInListPipe,
-    IonBackButtonOverrideDirective,
   ],
 })
 export class UtilModule {}