Hi Ben,
No code is changed in that respect in these last updates. Heimdall checks the ready state of all sensors at startup, it seems some of your sensors were not reported ready by Homey. Please check if all devices apps are running correctly and then restart Heimdall and check the dashboard again.
(btw, you can get a better overview of the dashboard by opening it from https://developer.athom.com/tools/app-settings and applying a custom css like explained here)
