Before Continuing:

• Always check you are using the latest version of the mods and its dependencies
• Remove known problematic rendering mods such as Optifine, Sodium and others. Do NOT report issues related to said mods
• If you are unsure which mod is the culprit.
  Disable half your mods at time until you isolate the culprit
• If you have a crash ALWAYS post LATEST.LOG below
• If the issue is about behaviors be sure to consult the WIKI first

Version-Loader

1.20.1-forge

Supplementaries Version

supplementaries-1.20-2.7.4.jar

Moonlight Lib Version

moonlight-1.20-2.8.67.jar

Issue Detail

Add a Silent Gear (silent-gear-.12.1-3.5.2.jar, silent-lib-1.20.1.8.0.0.jar) arrow to the quiver, shoot arrows and pick them up. You get a new arrow (1 ammo count) instead of the normal silent gear behaviour that they are added back to the existing arrows durability.
If it's hard to fix (as it's a non standard way of handling arrows), a blacklist for mods could be a simpler fix.

Optional Attachment

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To Produce

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whats their id? does this mean they dont even get subtracted from the quiver when used?

The ammo count (durability) is decreased when shooting so that part is working.
ID: silentgear:arrow
Item tag: minecraft:arrows

i feel like if i blaclist then people will complain that it doesnt work

blacklist was added in latest udate

Maybe, but the arrows aren't handeled in a normal way that can cause issues. For reference: SilentChaos512/Silent-Gear#270
The best way is if it's handled. If you go for a blacklist, do that in the config so that it's easy to add remove if it's fixed or new clashes are found.