We have discovered that some of our users who host their sites on Pantheon have experienced trouble staying consistently connected to QuickBooks and/or their license with our system. This is due to the way Pantheon treats the SERVER_NAME variable - which is dynamic on Pantheon's container-based hosting.
Fortunately, the resolution here is simple. Based on Pantheon's doc here: https://pantheon.io/docs/server_name-and-server_port/ - simply adding the below line of code to your wp-config.php file will ensure that Wordpress is sending the correct SERVER_NAME variable to QuickBooks Online and our licensing system.
$_SERVER['SERVER_NAME'] = $_SERVER['HTTP_HOST'];