My group selection is ignored in the "Connect to VPN" window

When I try to connect to my work VPN I get the following error:

AADSTS50105: Your administrator has configured the application Cisco AnyConnect Admin ('b310a2f5-bf0c-4919-ba1d-ad86190ad0c2') to block users unless they are specifically granted ('assigned') access to the application. The signed in user 'User name redacted' is blocked because they are not a direct member of a group with access, nor had access directly assigned by an administrator. Please contact your administrator to assign access to this application.

I believe the issue is that I'm connecting to the wrong group. In the 'Connect to VPN "<vpn name>"' window, there's a dropdown with the groups my company has defined. (see attached screenshot) However, I believe my choice is being ignored and it's trying to connect to the first group in the dropdown options.

My supporting evidence is that I can get a similar error in Windows with the official Cisco client by selecting the wrong group, and I used to be able to connect with network-manager-openconnect before my company restricted access to the first group in the list.

I've found the following snippet in the network-manager-openconnect-gnome package's source code, file auth-dialog/main.c:

ui_data->combo = gtk_combo_box_text_new();
populate_vpnhost_combo(ui_data);
gtk_box_pack_start(GTK_BOX(hbox), ui_data->combo, TRUE, TRUE, 0);
g_signal_connect_swapped(ui_data->combo, "changed",
                         G_CALLBACK(queue_connect_host), ui_data);
gtk_widget_show(ui_data->combo);

I'm not familiar with the GTK framework, but I think this is the misbehaving dropdown.

lsb_release -rd
Description: Ubuntu 22.04.1 LTS
Release: 22.04

apt-cache policy network-manager-openconnect-gnome
network-manager-openconnect-gnome:
  Installed: 1.2.6-4
  Candidate: 1.2.6-4
  Version table:
 *** 1.2.6-4 500
        500 http://archive.ubuntu.com/ubuntu jammy/universe amd64 Packages
        100 /var/lib/dpkg/status