The primary reason is to stop a toxic behavior pattern known as block cycling . Without a cooldown, a malicious user could:
You cannot block someone immediately after unblocking them on LinkedIn because .
Re-blocking immediately would create conflicting states in LinkedIn’s graph database, potentially causing errors like ghost notifications or partial profile visibility.
If you were previously connected, unblocking does not restore that connection. You would have to send a new connection request to reconnect.
It stops users from "gaming" the system—for example, blocking someone to hide their profile while they look at yours, then unblocking and re-blocking to stay invisible.