LinkedIn imposes a 48-hour cooling-off period after you unblock someone. During this window, the system treats the relationship as “in flux.” You cannot:
After exactly 48 hours from the moment you hit “unblock,” the block button becomes active again.
I reached out to LinkedIn Premium support with this exact scenario. Their official response was generic: LinkedIn imposes a 48-hour cooling-off period after you
“You can block any member at any time. If you are unable to block someone, please wait 24 hours and try again.”
But the internal engineering notes (leaked via LinkedIn’s own developer forums) confirm the 72-hour rule. They avoid publicizing it because: After exactly 48 hours from the moment you
In short: It’s not you—it’s their eventual consistency model.
Immediately after you unblock someone, LinkedIn enters a 72-hour "cooldown" or synchronization limbo. During this period, the system is actively reversing the original block (restoring old connection data, messages, and engagement metrics). To prevent system conflicts and malicious "block-churning" (repeatedly blocking/unblocking to harass), LinkedIn’s API temporarily hides the block button for that specific user. You cannot block the same person again until the system fully reconciles your relationship history. “You can block any member at any time
In short: You can block them again, but not right away. The wait time is typically 48 to 72 hours.
To confirm you are experiencing the exclusive lockout and not a bug, look for these three symptoms:
If you see these symptoms, you must wait exactly 48 hours from the moment you hit "Unblock."