Error afrer pressing key on server console

When Minecraft server was open by this command:
java -Xmx6G -jar server.jar
in windows normal console (cmd) after clicking the letter 'z' on the keyboard server will close with this error:

---- Minecraft Crash Report ----
// Surprise! Haha. Well, this is awkward.Time: 19.12.2021, 14:22
Description: Watching Serverjava.lang.Error: Watchdog
    at cqp.a(SourceFile:147)
    at cqp.a(SourceFile:141)
    at cqj.c(SourceFile:176)
    at cpy.getNoiseBiome(SourceFile:373)
    at cao.a(SourceFile:185)
    at cao.a(SourceFile:169)
    at cao$$Lambda$4730/0x0000000801627320.accept(Unknown Source)
    at [email protected]/java.util.Optional.ifPresent(Optional.java:178)
    at adg.a(SourceFile:403)
    at adg$$Lambda$4719/0x000000080161ac48.query(Unknown Source)
    at cao.a(SourceFile:168)
    at adg.q(SourceFile:352)
    at adg.a(SourceFile:325)
    at adi.a(SourceFile:308)
    at net.minecraft.server.MinecraftServer.b(SourceFile:879)
    at acj.b(SourceFile:324)
    at net.minecraft.server.MinecraftServer.a(SourceFile:823)
    at net.minecraft.server.MinecraftServer.w(SourceFile:684)
    at net.minecraft.server.MinecraftServer.a(SourceFile:270)
    at net.minecraft.server.MinecraftServer$$Lambda$4288/0x000000080141a8f8.run(Unknown Source)
    at [email protected]/java.lang.Thread.run(Thread.java:833)
A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------[...]

the same text is visible in the crash report.

This issue has occurred to me 2 times on the same day.

In the log, you can see that a single tick took too long and the server will shut down. There is one person on the server and no lag machines or anything else. Also, this message won't appear until you will press any button when in the console. I didn't check if it is bugging still if you use the GUI console.