Describe the Bug

Hello!
A friend of mine has create a contraption on my server, but when it's left running and unloaded for more than around half an hour, the whole server starts to get overloaded, and it builds up and gets worse over time.

Approaching the contraption at this point will result in a big lag spike both on the client and server side, before returning to normal.

Screenshot of the contraption:

While the server does have a claims mod that allows force-loaded chunks, they are disabled, and no other force-loading methods were used. I've also performed an experiment throwing items around the contraption to see if they would despawn, and they have not.

Server getting laggier with time until the contraption is loaded by a player.

Some Observations:

• The contraption uses up the gravel it generates at a much faster rate than it produces it, and when loaded in has a 0-2 range of gravel in storage at any time. When unloaded though, the quantity of gravel seems to start increasing.
• This happens when no one is online on the server at all.
• The log gave out a "Saving oversized chunk" warning at the location of the contraption. (This is how I originally found the source of the server lagging)

Reproduction Steps

1. Create a server.
2. Build the contraption.
3. Let the contraption run unloaded for ~30 minutes.

Contraption saved with a structure block:
contraption.zip

Expected Result

The server should start overloading, and should get worse the more it's let to run.

Screenshots and Videos

No response

Crash Report or Log

https://mclo.gs/Ky7Z3bw

Operating System

Ubuntu 22.04.4 LTS (Server) Windows 10 (Client)

Mod Version

0.5.1f

Minecraft Version

1.20.1

Forge Version

47.3.1

Other Mods

• AI-Improvements-1.20-0.5.2
• architectury-9.2.14-forge
• biggerstacks-1.20.1-1.0.0-all
• BiomesOPlenty-1.20.1-18.0.0.598
• caelus-forge-3.2.0+1.20.1
• camera-forge-1.20.1-1.0.8
• cloth-config-11.1.118-forge
• CraterLib-Forge-1.20-1.1.1
• createaddition-1.20.1-1.2.2
• CreativeCore_FORGE_v2.11.30_mc1.20.1
• endertechinf-3.8.1-forge-1.20.1
• Fastload-Reforged-mc1.20.1-3.4.0
• Female-Gender-Mod-forge-1.20.1-3.1
• ferritecore-6.0.1-forge
• geckolib-forge-1.20.1-4.4.5
• Jade-1.20.1-forge-11.9.2
• Kiwi-1.20.1-Forge-11.8.8
• letmedespawn-forge-1.20.1-1.20.4-1.2.1
• midnightlib-forge-1.4.2
• modernfix-forge-5.17.0+mc1.20.1
• NaturesCompass-1.20.1-1.11.2-forge
• NoChatReports-FORGE-1.20.1-v2.2.2
• open-parties-and-claims-forge-1.20.1-0.22.2
• origins-forge-1.20.1-1.10.0.9-all
• packetfixer-forge-1.4.0-1.19-to-1.20.1
• radium-mc1.20.1-0.12.3+git.50c5c33
• roxannes_builder_kit-1.1.0
• SnowRealMagic-1.20.1-forge-10.4.3
• TerraBlender-forge-1.20.1-3.0.1.7
• voicechat-forge-1.20.1-2.5.15
• voxelprint_desert

Additional Context

Before finding out the cause of the server lag, that being the contraption, I removed a few mods (with no visible effect):

• biggerstacks-1.20.1-1.0.0-all
• camera-forge-1.20.1-1.0.8
• letmedespawn-forge-1.20.1-1.20.4-1.2.1
• NoChatReports-FORGE-1.20.1-v2.2.2
• voicechat-forge-1.20.1-2.5.15

Using bigger stacks, the maximum stack size was originally 1M. Now it is 4096.

Thank you for your time!