cb-login page not being displayed after Joomla 3.7.3 upgrade

When a user is not logged in and tries to access a restricted page, They are not redirected to the cb-login menu. The link they are redirected to is www.i3health.com/component/comprofiler/login?Itemid=607 (See attached)

We believe this problem began after we upgraded to Joomla V3.7.3 but we're not certain.

Comparing our old staging site to our live site, the Community Builder menu was missing from Joomla Menus, but I'm not certain if that's causing the problem.

To reproduce the problem:
1. Go to www.i3Health.com .
2. Go to the CME menu and select Lung Cancer under "ONLINE ACTIVITIES"
3. Click the "Start Activity" tab in the article. (This page is restricted to registered users.)

This problem is happening everywhere on our site with restricted pages. The above is just one example. Before the problem started, the above steps would bring you to www.i3health.com/cb-login .

We tried manually adding the Community Builder/CB-login menu, but that didn't resolve the issue.

CB V2.1.2
Joomla V3.7.3

Install latest CB nightly build. We've already implemented a fix for our system plugin to look for an Itemid and set it accordingly when redirecting from Joomla user component.

Thanks! Would you please provide a link to the nightly build or instructions on where to find it?

The latest release is always downloaded when downloading from the product pages. CBs product page can be found below (menu link on menu bar above).

www.joomlapolis.com/community-builder

The same applies to download buttons on the add-ons page below.

www.joomlapolis.com/addons

Additionally the latest release is always selected on our downloads page below.

www.joomlapolis.com/downloads