Ability to join session when browser is running in a different user context

We'd like to be able to use ScreenConnect to connect to guests as a user other than the currently-logged-in user.  Current versions of Chrome and Edge do not allow the browser to be run as an admin using the right-click/Run as Admin option, so we would use a command like below to run the browser as that admin user, without the local admin permissions:

runas.exe /user:admin_username "\"C:\Program Files\Google\Chrome\Application\chrome.exe\" https://leg.screenconnect.com/Host#Access/"

When the browser is run this way, we can access and navigate the ScreenConnect website without issues, but any attempt to join a remote-control session currently fails.  We believe that the client installed on the host's machine simply doesn't understand when the user context it's running under doesn't match the user context of the logged-in user, and fails.