html.Br("") behaves incorrectly in multi-page app

Describe your context
Please provide us your environment, so we can easily reproduce the issue.

• replace the result of pip list | grep dash below

dash                      2.7.0
dash-bootstrap-components 1.2.1
dash-bootstrap-templates  1.0.7
dash-core-components      2.0.0
dash-daq                  0.5.0
dash-html-components      2.0.0
dash-table                5.0.0
mongo-dash                0.1.6

• if frontend related, tell us your Browser, Version and OS

  • OS: Monterey 12.4

Describe the bug

Replication example:

import dash
import dash_bootstrap_components as dbc
from dash import html

dash.register_page(__name__, name='Example', top_nav=True)

layout = dbc.Container(children=[
                                    html.Br("")
                                ])

In a multi-page app, I had accidentally put an empty string in a html.Br() element within the layout for a page. Whenever navigating to the page it would partially load for a second and then navigate back to the previous page I was on. I could however access the correct page by entering the url for the page in the browser.

Expected behavior

There should be some error message in debug that a redirection is happening and what is causing it.

Start with the supplied Dash multi-page reproduction using html.Br("") and observe navigation in debug mode. The payload names no source file or test; trace how the empty child is handled during page navigation, with completion indicated by a useful error explaining the redirect cause instead of the page silently returning to the previous route.