Mod preventing server shutdown 1.20.1 forge 47.4.10

[rk-exxec]

When running a dedicated server with musictriggers, the server process does not exit after stopping it.

It just hangs after the world is saved and never fully closes.

Am using musictriggers 7.0.4 and theimpossiblelibrary 0.4.7.

Here is the log at the end of running:

[14:32:00] [Stuck Thread Watcher/INFO] [DebugThreadsHooks/]: Stuck Thread: "pool-3-thread-1" Id=59
[14:32:00] [Stuck Thread Watcher/INFO] [DebugThreadsHooks/]: -- Stacktrace: 
        at bootstrap/java.base@17.0.15/java.util.concurrent.ThreadPoolExecutor.addWorker(ThreadPoolExecutor.java:945)
        at bootstrap/java.base@17.0.15/java.util.concurrent.ThreadPoolExecutor.ensurePrestart(ThreadPoolExecutor.java:1593)
        at bootstrap/java.base@17.0.15/java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:346)
        at bootstrap/java.base@17.0.15/java.util.concurrent.ScheduledThreadPoolExecutor.scheduleAtFixedRate(ScheduledThreadPoolExecutor.java:632)
        at TRANSFORMER/null/mods.thecomputerizer.theimpossiblelibrary.api.util.CustomTick.addCustomTick(CustomTick.java:23)
        at TRANSFORMER/null/mods.thecomputerizer.theimpossiblelibrary.api.util.CustomTick.addCustomTickTPS(CustomTick.java:42)
        at TRANSFORMER/musictriggers@7.0.4/mods.thecomputerizer.musictriggers.api.common.MTCommonEvents.init(MTCommonEvents.java:16)
        at TRANSFORMER/musictriggers@7.0.4/mods.thecomputerizer.musictriggers.api.common.MTCommonEntryPoint.onPreRegistration(MTCommonEntryPoint.java:104)
        at TRANSFORMER/musictriggers@7.0.4/mods.thecomputerizer.musictriggers.api.common.MusicTriggersGeneratedCommonMod.<init>(MusicTriggersGeneratedCommonMod.java:-1)
        at bootstrap/java.base@17.0.15/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(NativeConstructorAccessorImpl.java:-1)
        at bootstrap/java.base@17.0.15/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77)
        at bootstrap/java.base@17.0.15/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at bootstrap/java.base@17.0.15/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:500)
        at bootstrap/java.base@17.0.15/java.lang.reflect.Constructor.newInstance(Constructor.java:481)
        at LAYER PLUGIN/javafmllanguage@1.20.1-47.4.10/net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:77)
        at LAYER PLUGIN/fmlcore@1.20.1-47.4.10/net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$5(ModContainer.java:126)
        at bootstrap/java.base@17.0.15/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804)
        at bootstrap/java.base@17.0.15/java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796)
        at bootstrap/java.base@17.0.15/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373)
        at bootstrap/java.base@17.0.15/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182)
        at bootstrap/java.base@17.0.15/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655)
        at bootstrap/java.base@17.0.15/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622)
        at bootstrap/java.base@17.0.15/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165)

        Suspecting mods:
         - Music Triggers (musictriggers)
           - version: 7.0.4
           - file: musictriggers-7.0.4.jar

[14:32:00] [Stuck Thread Watcher/WARN] [AllTheLeaks/]: Seems like server is stuck while trying to close. Read messages above about stuck threads!

This is also reproducible with only these two mods installed. The client exits just fine.