I reported this crash on Curios, and they told me it's a silent's gear issue
TheIllusiveC4/Curios#168
net.silentchaos512.gear.compat.curios.CurioGearItemCapability$2.curioTick(CurioGearItemCapability.java:62)
This appears to be an issue with the Curios compatibility from Silent Gear. Please report it to them instead.

The crash happens at random when I have a lot of curios items and try to equip them all at once (picking tombstone)
If I have a small amount of curios items, the crash never happens.
Now that I got that reference to silents, I realize I have the wireless crafter from RS on a curios created by Gears

die
go to tombstone
try to recover (a lot) of curios items
game crashes (sometimes)

https://pastebin.pl/view/2a07179e

Versions

Curios: curios-forge-1.16.5-4.0.5.3.jar

• Silent Gear: silent-gear-1.16.5-2.6.31.jar
• Silent's Gems: SilentGems-1.16.3-3.7.16.jar
• Silent Lib: silent-lib-1.16.5-4.10.0.jar
• Forge: 36.2.4
• Modpack: N/A
• Optifine Installed: No