According to LinkedIn's official help documentation: "You’ll have to wait 48 hours before re-blocking the same member after unblocking." This is not a bug or a glitch; it is a specific restriction coded into the platform to prevent abuse of the blocking system.
: If you share or have shared a LinkedIn Recruiter account with this person, LinkedIn may notify them if you block them.
Constantly toggling connection and privacy data fields for identical accounts strains database indexing. Limiting these changes protects the platform's core performance. Critical Technical Considerations During the 48 Hours The best course of action is to wait
Prevent the unblocked user from sending you a surprise invitation. Go to > Invitations to connect .
The best course of action is to wait out the two days, and then re-block the user. Once the 48 hours have passed, you can go back to their profile, click the button, and select Report / Block again. If you'd like, I can: Show you how to report the person instead of waiting. remove reaction notifications
LinkedIn implemented this specific restriction to tackle two major network vulnerabilities:
If you just unblocked someone—whether intentionally or by accident—the "Block" button on their profile will temporarily disappear or result in an error message. The Architecture Behind the 48-Hour Rule click the button
Consider the reverse engineering perspective. If you could block and unblock instantly, what stops you from using that to bypass a block you’ve received?
This is an exclusive security and anti-harassment feature designed to prevent "block cycling"—a toxic behavior where users repeatedly block and unblock someone to effectively erase chat histories, remove reaction notifications, or silently unfollow someone without their knowledge.