So Here you can clearly see how I have like 7 races modifiers after chosing them with an orb of origin
It persists after death and through relogs

Can't reproduce this one on 1.18.1. Haven't check .2
At least not with default origins

I was using 1.18.1. It seems to happen when one of the powers doesn't get registered? Idk it happened a lot during testing

I know which one they're using, BucolicOrigins with Origins .12+, I just can't figure out what goes wrong.

It would be much more helpful if you could give the specific Origins version and the mod/datapack you're using :)
Btw, having a try of the latest Origins version could be a solution.

Failed to reproduce this on { MC 1.18.1 + Origins 1.3.2.1 + BucolicOrigins 3.1[FORGE-CHOOSE-COMPATIBLE] } after trying switching between 10+ origins using orbs. Seemed all fine for me.
These leftover powers displayed in the issue seemed completely random, I couldn't find any relations between them.

Btw, nice addon! :) Wandering if lang files(en_us.json) could be used instead of hard coded names and descs, I'm interested in helping with some translation(zh_cn) work.