Cant change material toolbar title from bottomnavigation OnItemSelectedListener

Question

I am trying to change the material toolbar title, on bottom navigation item click. but it is not working, the title is not changing. but outside of the block it works fine

here is my code:

 homeBinding.navView.setOnItemSelectedListener(new NavigationBarView.OnItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            Fragment fragment = null;
            switch (item.getItemId()){
                case R.id.home:
                    homeBinding.mainToolbar.setTitle("Home");
                    homeBinding.imageTitle.setContentDescription("Home");
                    fragment = new HomeFragment();
                    break;
                case R.id.project:
                    homeBinding.mainToolbar.setTitle("Home");
                    homeBinding.imageTitle.setContentDescription("Project");
                    fragment = new ProjectsFragment();
                    break;
                case R.id.favorites:
                    homeBinding.mainToolbar.setTitle("Home");
                    homeBinding.imageTitle.setContentDescription("Favorites");
                    fragment = new FavoritesFragment();
                    break;
                case R.id.profile:
                    homeBinding.mainToolbar.setTitle("Home");
                    homeBinding.imageTitle.setContentDescription("Profile");
                    fragment = new ProfileFragment();
                    break;
            }
            getSupportFragmentManager().beginTransaction().replace(R.id.home_fragment_container,fragment).addToBackStack(null).commit();
            return true;
        }
    });