DH 2.3 Server CPU Usage Fluctuates/Cause Lag

Hi there, I wanted to check if there's some weird stuff going on with DH 2.3 on dedicated server.
Despite all the LOD have been finished generation, checked via /dh debug, there's seems to be still insane server CPU load randomly sometimes causing lag spike even on client as well, what's the possible problem causing this?

Logs doesn't have any error.
It's used in a custom modpack, tested with DH and without DH, both CPU usage varies a lot.
If it's without DH, the server idles at 3%~ usage. If it's with DH, it spikes between 3% ~ 50%, it spikes every 5~8 seconds to 50%++.

Pics are attached with task manager for reference.

First pic is idle without DH, 2.0% usage,
second pic is "minimum usage" with DH, 1.8% usage
third pic is "maximum usage" with DH, 49.8% usage
fourth pic is the /dh debug info

CPU: Ryzen 9 5900X
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