The bug: Unlike placing and breaking blocks on your screen, end crystals aren't that fast on your screen when you have high latency (or ping).

Steps to reproduce:

1. Join a server outside of your own continent (like joining a North American server as a European for example)
2. Notice how placing and breaking your end crystal are a lot slower than placing and breaking blocks

Please consider the fact that server-lag is also a big factor here. For example a server with 60 players on will have a lot slower crystals than a server with 2 players on.

For a more severe effect try joining an Australian server as a European, as a North American, etc so that your latency will be above 200ms.

Expected behavior: Your placing and breaking speeds for your crystals on your screen should be the same as placing and breaking blocks if your latency is high.

Actual behavior: Server-lag and your latency affect your crystal speeds.