Why does HomeKit fail on Apple Watch so frequently?

Hello JustSomeOldGuy,

Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you're having issues with HomeKit on your watch. Follow the steps listed here to see if they help: Control your home with Apple Watch - Apple Support

"View your home status

The Home app  shows you the status of accessories you’re currently using—for example, the temperature registered by your thermostat or an unlocked front door. Just tap a button to control the accessory or learn more.

1. Open the Home app  on your Apple Watch.
2. Tap any of the round buttons that appear just below your home’s name.

When multiple accessories appear in a status, tapping the status lets you control each device or set of grouped devices. For example, if all the lights are on in the living room and bedroom, you can tap the status, then turn off just the lights in the living room.

Control smart home accessories and scenes

In the Home app  on your Apple Watch, the relevant scenes and accessories for that moment appear near the top of the screen. For example, a coffee maker may appear in the morning and be replaced by your bedside lamp at night.

You can see the rest of your accessories by scrolling up, then tapping Cameras, Favorites, or a room.

To control an accessory, do any of the following:

• Turn an accessory on or off: Tap the accessory—a light, for example—or, if you want to unlock a compatible lock, a home key.
• Adjust an accessory’s settings: Tap  for an accessory. Tap Done to return to the list of accessories.
• The available controls depend on the type of accessory. For example, with some lightbulbs, there are controls for both brightness and changing colors. Swipe left to see additional controls.
• Control favorite accessories or accessories in a room: Tap Favorites or a room, then tap an accessory or tap  to adjust the accessory’s settings.
• View a camera’s video stream: Tap Cameras, then tap a camera.

To run a scene, open the Home app  on your Apple Watch, then tap the scene.

View a different home

If you have more than one home set up, you can choose which one to view on your Apple Watch.

Open the Home app  on your Apple Watch, then do one of the following:

• If the Home Screen is showing, tap a home.
• If a specific home is showing, tap <, then tap a different home."

If you have feedback for Apple you'd like recognized, you can also leave it here: Product Feedback - Apple

We hope this helps.

Cheers!