HMS sensors do not alert you when offline

I’ve had my HMS a few months now and so far I’ve had one motion sensor and one door sensor go offline. Neither sent me any sort of alert they were offline meaning that those two locations were unprotected. Is there not a sensor offline alert built into this system?

The fix for the motion sensor was to replace the battery (no low battery warning and surprised it died already) and the door sensor was to delete and add it again.

I would hope a security system would alert you a part of it was offline?