If your alarm panel is mounted on the wall and you are receiving a "Tamper Alarm: Host Panel" notification, it may be due to the Gen 2 alarm panel not sitting flush on the mounting bracket. If there was a slight shift in the wall or another issue causing the plate to slightly change position, the Tamper Alarm: Host Panel may be triggered.
Here is the location of the tamper switch on the Gen 2 alarm panel:
The area that is circled in Red is the alarm panel Anti Tamper Switch.
The area circled in Red is the Tamper Switch leg on the mounting plate:
A test was performed when the tamper switch leg is removed from the mounting plate.
Link where you can watch or download the video: Gen 2 Tamper leg removal
If you have not resolved the issue with the mounting plate installed on your wall triggering the tamper switch, the above removal of the tamper switch is a possible solution if you wish to take that route.