No longer receiving UPDATES notifications

I have two instances of Home Assistant in two different locations. I keep both updated with latest OS, and core updates. But one of the instances never notifies when updates are available.
I have looked everywhere I cannot find an obvious reason why this is happening. While I can easily update via CLI, it is driving me insane not knowing the cause.
Both running HA OS, RPi4.
Suggestions very much appreciated.
This is a screen shot of the instance that notifies properly.