“Siri navigate home” takes me to an adjacent street occasionally

It's looking like a GPS problem, it can happen depending on the weather conditions, but check the GPS settings

in privacy>Location services>System services toggle on compass calibration, Networking & Wireless  and Motion Calibration & Distance, in Find My turn on precise location. Check your cellular data is on

Make sure that you've set the date, time, and time zone correctly on the device in Settings > General > Date & Time. If possible, use Set Automatically

After that best Hard restart the iPhone

About privacy and Location Services in iOS, iPadOS, and watchOS - Apple Support

Maybe you set a different address in your profile for Siri?

Tell Siri who you are

1. Open Contacts , then fill out your contact information.
2. Go to Settings > Siri & Search > My Information, then tap your name

Occasionally means a weak GPS satellite signal, if you’re still experiencing it after having checked all your settings, you can try resetting the Location & privacy settings in general>reset iPhone>reset>reset Location & privacy settings

There are a lot of things that can interfere with GPS signals, including buildings, trees, weather. It's just a limitation of the technology. To compensate for that, phones also use cell towers and WiFi networks to provide additional information.

Make sure that you have WiFi turned on. It doesn't have to be connected to any network, just enabled. This can make a huge difference in the accuracy.

It can be that when you tap on the map to reach the home location is saved as different gps coordinates than the ones for the address on the map. In this case you will have different positions. In fact some maps can be inaccurate for some addresses. But it's crystal clear that it's a GPS coordinate NOT an address.

SOLVED!

I had to delete my contact info. Must have somehow been corrupted, but I tried everything else and when I did it and created and typed it all back in again, it worked! Contacts/ click on 'my card' at the top of the list with your name, and edit/delete contact, and start over. I checked everything and it was already typed in perfectly correct, but this worked anyway. Good luck

Because it’s GPS positioning and GPS navigation that gets your position and takes you home, the address is in memory as coordinates and the GPS is finding its position on the map

You can also disable and re-enable Siri Go to Settings>Siri&search> turn off Hey Siri, wait a few seconds, and turn it back on again.