There are known issues with devices reporting different device health states between apps. You should report those to firstname.lastname@example.org so they can track the issue.
As for the thermostat and lock, not all devices fully work in the new app but the devices should still show up and most device details screens should load. Are the devices completely missing from your list of Devices?
Removing and re-adding is not likely to make a difference.
For devices to work properly in the new app, the device type needs certain metadata. A few weeks ago a generic fallback was added which increased the number of devices you could view but there are still quite a few that aren’t controllable.