Angular redirects to weird url string

I have [AuthGuard] for /profile/personal-data which watching if the user has logged or not . And after login() I do this.router.navigates['profile/persnal-data'] and it works correct. But when I'm not logged in and try to put in browser /profile/person then app redirects me to ?path=%2Fprofile%2Fpersonal-data. I don't know what am I doing wrong ?

route.config

const routes: Routes = [
  {
    path: '',
    component: ProfileComponent,
    children: [
      { path: '', redirectTo: 'personal-data', pathMatch: 'full' },
      { path: 'personal-data', component: PersonalDataComponent, canActivate: [AuthGuard] },
    ]
  }

];

Gurard.ts

import { Injectable } from '@angular/core';
import { CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot, Router } from '@angular/router';
import { Observable } from 'rxjs';

import { AuthentificationService } from '../services/authentification.service';

@Injectable({
  providedIn: 'root'
})
export class AuthGuard implements CanActivate {

  constructor(
    private router: Router,
    private authentificationService: AuthentificationService,
  ) { }

  isEmpty(obj): boolean {
    for (const prop in obj) {
      if (obj.hasOwnProperty(prop)) {
        return false;
      }
    }
    return JSON.stringify(obj) === JSON.stringify({});
  }

  canActivate(
    route: ActivatedRouteSnapshot,
    state: RouterStateSnapshot): Observable<boolean> | Promise<boolean> | boolean {
    return Observable.create(observer => {
      if (
        localStorage.getItem('access-token-1cb-portal') != null &&
        localStorage.getItem('expires-at-access-1cb-portal') != null &&
        localStorage.getItem('refresh-token-1cb-portal') != null &&
        localStorage.getItem('expires-at-refresh-1cb-portal') != null
      ) {
        observer.next(true);
        observer.complete();
        return;
      } else {
        this.router.navigate(['/'], {
          queryParams: {
            path: state.url
          }
        });
        observer.next(false);
        observer.complete();
        return;
      }
    });
  }
}

UPD 1

I have updated my Guard to simple

intercept(request: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>> {
    return next.handle(request);
  }

It still redirect's me to main page with strange url http://localhost:4200/?path=%2Fprofile%2Fpersonal-data but when I remove canActivate: [AuthGuard] from my route.config for profile route ,and it workes and redirect to the right page. What is going wrong , why the guard make huge sense for this behaviour ?