Ancient tomes not dropping from raids

[Estyria]

Prerequisites

• I am running the latest alpha version of MineColonies and Structurize for my Minecraft version.
• I checked the MineColonies/Structurize wiki and made sure my issue is not covered there.
• I made sure that this issue is not a duplicate of any existing issue.

Context

• Minecraft Version: 1.18.1
• MineColonies Version: 1.18.1-1.0.394-ALPHA
• Structurize Version: 1.18.1-1.0.341-ALPHA

Problem description

I have been playing a 1.18.1 world for a couple hundred in game days at this point (weeks in real life) and have only gotten one ancient tome from a raid waaaay back when I first started this save. If that. It's been long enough now I'm wondering if I just creatived it in. I've had probably more than twenty raids with no drops. In fact I don't think they've dropped armor or weapons either, but those are harder to track.

Notes or related things

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[someaddons]

They drop weapons and tomes as intended for me, which raider entities did you face?

[Estyria]

Amazons, norsemen, and vikings.

[Estyria]

And regular barbarians I think

[someaddons]

regular barbarians/amazons work fine, but norsemen are actually missing loot

[Estyria]

I'm in a taiga, fairly landlocked, so the norsemen are the bulk of the raiders that I face. I had a barbarian raid this morning that dropped a single iron axe.