I dont know if this is a separate problem, Ive seen it in many servers though: The entity is removed on sh_round_end, and I know the variables are set to false on spawn, but if you charge the kamehameha before round end and fire it afterwards, you can spawnkill. I solved it by adding a simple check in sh_client_spawn(), the same as in sh_round_end. Removes the ent at spawn, spawnkill no longer possible.
Hybrid Mode
