This isn't normal either...

Your username: JeromeAlbert
In which minigame/server does the bug occur: Herobrine's Chamber
Detailed description of bug: Well I was playing herobrine's chamber until i saw this, with made the game unbeatable...

Wut?

 

I found that bug as well.

 

Now I'm no dev or coder, but 2 things are -most likely- happening.

1: Bukkit is being a douche and screwing with the HC plugin
2: The server is having a hard time keeping up with the plugin, causing these glitches

Just some ideas to put in an expert's head.

 

It could even be world guard not allowing a block to be placed there

 

HC doesn't have WG, from what I know

 

Oh well most things do for ease of non block placing allowed...
Then again you can break the logs...
Yeah

These are probably the best ideas of why the glitch happens

 

I've seen this before many times. It's just a bug getting fixed process.

 

Could it be a schematic loading problem?

 

No No, This is malfunction when Bukkit tries to find the sector where the KOTL exists and tries to show it/make it work, And by not finding the part where that block exists, it doesn't show it, but although it happends sometime, this may be because of a slight overload or a leak