Purpur 1.20.1 Server having massive lag spikes during world save

I am a admin in a minecraft server that, around earlier last month, started having lag spikes whenever the world saved. We previously used paper, so we decided to try and switch to purpur and see if that + removing any citizens npc's that we placed down around that time would work, however sadly it did not. We have tried many things, such as different configs, removing datapacks, and nothing we try works. So maybe one of yall might have a idea on what's causing it?

This is spark with flags that only log when the server saves:
https://spark.lucko.me/cAdJX1vQac

This is spark with no flags (forced world save):
https://spark.lucko.me/brZcEgPQdU
spark is a performance profiler for Minecraft clients, servers, and proxies.
spark is a performance profiler for Minecraft clients, servers, and proxies.
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