Despite silverfish can spawned from trial spawners, but they can still attack each other, unlike other monsters that can spawned in trial spawners.
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discovered while testing 1
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Also confirmed.
The cause is that the entity tag #no_anger_from_wind_charge excludes Silverfish while including all other Trial Chambers mobs.
To reproduce, spawn a bunch of Silverfish and Breezes, then an Iron Golem in the center. After a while, the Silverfish will switch from attacking the Iron Golem to fighting the Breezes.
Can confirm