What were you doing when the issue happened?

Breaking a lamp on a dedicated server make other players (not the one that breaks it) crash (sometimes).

I don't know if it is more related to this mod or Optifine as it is also in the stacktrace, though bluepower is higer up in it.

What did you expect to happen?

No exception.

What happened instead

Crash.

Crashlog on pastebin/gist

https://pastebin.com/59PR1XJ0

Forge and Minecraft version

1.14.4-28.1.26

Bluepower version and build number

1.14.4-0.3.127

Let me know if this happens again once the new version is available, wasn't able to replicate but it should be fixed in this update.