Death messages leak into lobby

[Restioson]

Possibly related log:

Invoking PlayerDeathEvent:

java.lang.NullPointerException: Cannot read field "kills" because the return value of "us.potatoboy.skywars.game.SkyWarsActive.getParticipant(xyz.nucleoid.plasmid.util.PlayerRef)" is null
at us.potatoboy.skywars.game.SkyWarsActive.getDeathMessage(SkyWarsActive.java:296)
at us.potatoboy.skywars.game.SkyWarsActive.onPlayerDeath(SkyWarsActive.java:221)
at xyz.nucleoid.stimuli.event.player.PlayerDeathEvent.lambda$static$0(PlayerDeathEvent.java:23)
at xyz.nucleoid.stimuli.event.player.PlayerDeathEvent.lambda$static$0(PlayerDeathEvent.java:23)
at net.minecraft.class_3222.handler$bhl001$stimuli$onDeath(class_3222.java:11977)
at net.minecraft.class_3222.method_6078(class_3222.java)
at net.minecraft.class_1309.method_5643(class_1309.java:1246)
at net.minecraft.class_1657.method_5643(class_1657.java:938)
at net.minecraft.class_3222.method_5643(class_3222.java:738)
at us.potatoboy.skywars.game.SkyWarsActive.tick(SkyWarsActive.java:317)
at xyz.nucleoid.plasmid.game.event.GameActivityEvents.lambda$static$8(GameActivityEvents.java:98)
at xyz.nucleoid.plasmid.Plasmid.lambda$registerCallbacks$2(Plasmid.java:106)
at net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.lambda$static$6(ServerTickEvents.java:63)
at net.minecraft.class_3218.handler$zge000$fabric-lifecycle-events-v1$endWorldTick(class_3218.java:2774)
at net.minecraft.class_3218.method_18765(class_3218.java:410)
at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:948)
at net.minecraft.class_3176.method_3813(class_3176.java:283)
at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:845)
at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:683)
at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:270)
at java.base/java.lang.Thread.run(Thread.java:840)
Invoking PlayerDeathEvent:

java.lang.NullPointerException: Cannot read field "kills" because the return value of "us.potatoboy.skywars.game.SkyWarsActive.getParticipant(xyz.nucleoid.plasmid.util.PlayerRef)" is null
at us.potatoboy.skywars.game.SkyWarsActive.getDeathMessage(SkyWarsActive.java:296)
at us.potatoboy.skywars.game.SkyWarsActive.onPlayerDeath(SkyWarsActive.java:221)
at xyz.nucleoid.stimuli.event.player.PlayerDeathEvent.lambda$static$0(PlayerDeathEvent.java:23)
at xyz.nucleoid.stimuli.event.player.PlayerDeathEvent.lambda$static$0(PlayerDeathEvent.java:23)
at net.minecraft.class_3222.handler$bhl001$stimuli$onDeath(class_3222.java:11977)
at net.minecraft.class_3222.method_6078(class_3222.java)
at net.minecraft.class_1309.method_5643(class_1309.java:1246)
at net.minecraft.class_1657.method_5643(class_1657.java:938)
at net.minecraft.class_3222.method_5643(class_3222.java:738)
at us.potatoboy.skywars.game.SkyWarsActive.tick(SkyWarsActive.java:317)
at xyz.nucleoid.plasmid.game.event.GameActivityEvents.lambda$static$8(GameActivityEvents.java:98)
at xyz.nucleoid.plasmid.Plasmid.lambda$registerCallbacks$2(Plasmid.java:106)
at net.fabricmc.fabric.api.event.lifecycle.v1.ServerTickEvents.lambda$static$6(ServerTickEvents.java:63)
at net.minecraft.class_3218.handler$zge000$fabric-lifecycle-events-v1$endWorldTick(class_3218.java:2774)
at net.minecraft.class_3218.method_18765(class_3218.java:410)
at net.minecraft.server.MinecraftServer.method_3813(MinecraftServer.java:948)
at net.minecraft.class_3176.method_3813(class_3176.java:283)
at net.minecraft.server.MinecraftServer.method_3748(MinecraftServer.java:845)
at net.minecraft.server.MinecraftServer.method_29741(MinecraftServer.java:683)
at net.minecraft.server.MinecraftServer.method_29739(MinecraftServer.java:270)
at java.base/java.lang.Thread.run(Thread.java:840)