Listen, my brother and I also struggled for a long time on HumanitZ public servers, with zombies teleporting and loot disappearing at the most crucial moments. In the end, we gave up on it and rented our own corner so we wouldn’t have to depend on admin bucket lags. I highly recommend checking out https://supercraft.host/humanitz-server-hosting/ it’s a cool hosting service where the map loads clearly, even when you step on the gas in your car, and zombies don’t turn into a slideshow during hordes. The setup is simple my son and I figured it out in an evening, all thanks to the convenient panel. The main thing is that now our progress doesn’t disappear, because backups are made automatically.