1.20.1 forge/NeoForge Self-Hosted Server Unresponsive

I play on the same PC that I'm hosting server and after awhile of playing the server stops responding. Console shows no errors, no crashes just window stops responding and any players get kicked with "Server connection timed out". I connect to server directly so its not internet issue. Something is causing the process to hang and I do not know how to find out what. This happens vanilla and modded. Spark for config: https://spark.lucko.me/QXwX0ZbSKt
spark is a performance profiler for Minecraft clients, servers, and proxies.
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