If a trial spawner turns ominous and gets completed, the next time it goes off cooldown and gets regularly activated, the first mob spawned will still have the equipment from ominous trials.

Steps to Reproduce :

1. Locate a trial spawner in trial chambers (make sure the spawned mob can equip, like skeletons)
2. Drink an ominous bottle, go into survival to turn the spawner ominous and beat it
3. Drink milk to remove trial omen
4. To quickly pass the cooldown, stand on top of the spawner and run the command: /data merge block ~ ~-1 ~ {cooldown_ends_at:0L}
5. Make sure you are in survival to activate the spawner again and observe the first spawned mob

Observed Behavior :

The mob will usually (not always) be wearing equipment exclusive to ominous trials, like trimmed armor

Expected Behavior :

The mob wouldn't have equipment exclusive to ominous trials