PaperMC/paper-server/patches/sources/net/minecraft/server/commands/ScheduleCommand.java.patch

--- a/net/minecraft/server/commands/ScheduleCommand.java
+++ b/net/minecraft/server/commands/ScheduleCommand.java
@@ -58,7 +58,7 @@
         } else {
             long j = source.getLevel().getGameTime() + (long) time;
             ResourceLocation minecraftkey = (ResourceLocation) function.getFirst();
-            TimerQueue<MinecraftServer> customfunctioncallbacktimerqueue = source.getServer().getWorldData().overworldData().getScheduledEvents();
+            TimerQueue<MinecraftServer> customfunctioncallbacktimerqueue = source.getLevel().serverLevelData.overworldData().getScheduledEvents(); // CraftBukkit - SPIGOT-6667: Use world specific function timer
             Optional<net.minecraft.commands.functions.CommandFunction<CommandSourceStack>> optional = ((Either) function.getSecond()).left();
             String s;