The server doesn’t know you have a new build installed until you actually log into the game with the new build.
So if you install the build overnight, or while you’re logged off for a long period, people on the old version will still be able to attack you until you log back in.
But once you log in with the new version, the system will see that you have a new version and those raids will become unrevengeable.
So my recommended update process is this:
- Finish all revenges you want to finish before updating
- Log out
- Update to the new version
- Log back in so the system knows you updated
- Clear your watchtower of resources
- Log back out
If you don’t log in immediately after updating, you will likely have some raids happen that will be unrevengeable when you do finally log in