Forge version: 14.23.5.2838
Twilight Forest version: 3.9.984

Steps to reproduce:

1. Naga was Killed
2. head to the twilight lich

What I expected to happen: Was able to to reflect the Lich ender pearl attack

What happened instead: It break instead of reflect,i try using punch/sword or arrow also give me the same result

i was using the Roguelike Adventures and Dungeons mod pack

I have the exact same problem on my custom pack. I have the latest version of the mod.

Can you show your advancements

Same problem. Pearls will not reflect. They appear to break. Using twilightforest-1.12.2-3.10.1013.
Here are my advancements:

After restarting the server, the number of Lichs was reduced to a single set of 3 and I was able to find the correct one and destroy the shields.