The platform treats blocking as a serious, irreversible (for 48 hours) act. It is not a mute button. It is not a snooze. It is a digital restraining order. By forcing a waiting period, LinkedIn protects you from your own impulsivity, prevents game-theory abuse by bad actors, and gives its global server network time to clean up the mess you just made.

After exactly 48 hours from the moment you hit “unblock,” the block button becomes active again.

If you are waiting out the 48-hour clock to re-block them, you can Mute them to stop seeing their activity in your feed.

Beyond the 48-hour timer, there are a few other reasons the block feature might be unavailable to you: Block a member - overview | LinkedIn Help