It's essential to distinguish between the "space" error and a nearly identical bug that causes an implosion with the message: “The Gateway imploded because an entity was removed without being killed.” This verified issue occurs when a modded entity (such as a creeper from the gate itself) is removed from the world via explosion or forced despawning before the kill is registered. In the case of the Endless Gates (wave counts exceeding 20 or 30), this is often attributed to a "niche apothic trait" or a specific interaction between enemies that causes the gateway to think the entity is dead when it isn't, leading to an error crash.
In certain modpacks like StoneBlock 4 , physical space actually is the culprit. High-tier gateways require significantly larger clear volumes than standard zombie or skeleton portals.
While the "gateway imploded" error is immensely frustrating, it is not insurmountable:
When the next wave cannot spawn, the gateway cannot offload the request. It holds the request in a buffer. That buffer fills. The gateway then holds the connection thread. The thread manager deadlocks. Finally, the OS scheduler sees a non-responsive process and sends a SIGKILL. The collapse happens from the inside of the process space outward.
