Entry Sensor -> Blue Lights & Chime... but no countdown from Keypad? Was working fine for years.

Greetings All!

I have an existing system that's been functioning reliably for about 6 years now in this house.   The garage entry door, which we normally leave and enter the house through, sits within 3 feet of our wall-mounted keypad.   The door itself has a door sensor on it.

Recently, my wife and I realized that, when we enter the house (while the alarm unit is activated), the usual "30-second countdown with beeping" / warning that the alarm is about to occur... does NOT happen.   It typically won't begin until after we shut the door again.  And sometimes, there's a delay in the countdown starting even after that.

This issue seems to have begun about two basestation-updates ago... so... just a few weeks ago.   Since then I have TOTALLY REPLACED the door sensor... both pieces... with a new one purchased from Simplisafe.

And yet the problem is still happening.

I tried testing with our home's front door / door sensor and the countdown seems to engage right away.

I thought perhaps the base station wasn't getting the signal... but I noticed that we still do hear the "dung-ding" from the base station when we open that garage entry door.   So that makes me think it's not a base station issue?

Any thoughts?

Thanks!