One sided blocking doesn't make sense. If you feel forced to go to the lengths of blocking someone, then not only should you be unable to see their chat they should be unable to see your chat. It just leaves room for the issues to continue and escalate via third party and unblocking to see what the other person is saying about the blocker. I've never seen one-sided blocking on any other social platform and this is probably why. Please either remove the blocking feature altogether or fix it on both sides.