When Blockland says your latency is 0, it is in fact so high that it doesn't display correctly.
This is most likely client-sided lag. In other words, your computer is lagging because there are too many bricks, players, particles, or other objects. You may need to turn down your graphics settings.
This is the real reason that I've concluded:
Blockland is running so slow that multiple packets are received in the same frame, causing the game to think that no time has passed. Normal clients have high FPS rates (100+ per second meaning less than 10ms inaccuracy).
This is a little more speculative:
Servers are set to 32 per second which could make pings inaccurate by up to 31.25ms. You can see that by the "unstable" pings that servers report.
