Django 3.1+ sidebar issues in django CMS modals

[Iacopo Spalletti]

Django 3.1 sidebar is visible in most django cms modals (the one generated by the toolbars)

See examples below:

[Petr Klus]

I know this is not a direct solution but I've disabled the new app sidebar throughout my admin site via the following nippet:

from django.contrib.admin import AdminSite

class CNKAdminSite(AdminSite):
    site_header = 'Site administration'
    enable_nav_sidebar = False

admin_site = CNKAdminSite(name='cnkadmin')

Perhaps would be helpful to anyone who stumbles upon this.