The easiest option would be to create a diagnostic report from the Apollo Automation-app on Homey. Our own support can’t offer any support here unfortunately, the developer can see exactly what is going on with that report
You’ll most likely have to uninstall the app, restart your Homey, and then reinstall the Apollo app. If that doesn’t work then you’ll need to remove the devices and add them again.
As for the HLK app, please go to the devices URL web server and make sure that the mmWave Bluetooth is toggled on. Then you should be able to see it in the app. I’ll look into adding that toggle into the devices settings.
Can you please confirm that you’re using the test app and which version number do you see?
Interesting. Not sure why it would revert back to an older version. Here’s the link to the test app to try again: Apollo Automation | Homey
The Bluetooth antenna on the LD2450 has limited range so you’ll need to be close to the device. BUT if it’s also not showing any presence detection on the web server then we might need to troubleshoot a few other things.