Are you sure you can use the custom models with Coral?
On my main screen in the settings (where it gives launch defaults) custom is greyed out and MobileSSD is what it is there.
On your Codeproject server (click the launch button from the same AI settings window in BI settings) is the Coral TPU enabled and running? Start it if not. Is Yolo disabled? Someone correct if I'm wrong, but I don't think you can use them both without conflict, and when I disabled Yolo, detection times decreased drastically.
While you're on that screen, look at the status log and see what it is doing.
To make finding what you want easier, turn off static object detection. You're constantly pinging the AI.
Other notes (but this doesn't seem to be an issue):
Make sure windows services has codeproject set for automatic startup. If you're running BI as a service, change it from automatic to delayed. CP has to start first. Reboot it (or stop the 2 services, then launch CP, wait, launch BI) and see what happens.
Your times in the coral.png file seem way high. Wondering if your system is timing out, perhaps caused by one or more of the issues above.
Edit -- go to the status tab (where you can see the log, cameras, drop AI files, etc...) click on log, and see if you're getting AI timeouts.