In the trial spawner nbt, the ominous_config tag sets the configuration values to use in ominous mode. Any omitted values are copied from the normal_config tag. However, when any values in ominous_config are equal to the default value, they don't get saved, resulting in them being copied from normal_config on the next load.
How to reproduce:
1. Use the following command to place a custom trial spawner:
/setblock ~ ~ ~ minecraft:trial_spawner{normal_config:{spawn_potentials:[{data: {entity:{id: "zombie"}}, weight: 1}], total_mobs:1.0f},ominous_config:{total_mobs:6.0f}}This trial spawner should have a total mobs setting of 1 in normal mode and 6 in ominous mode.
2. Drink an ominous potion and go into survival mode
3. ✔ you will indeed need to defeat 6 zombies to get the reward.
4. Go back into creative mode, break the spawner and rerun the command to reset the cooldown.
5. Optional: ❌ Use /data get block to see that ominous_config.total_mobs is not saved in nbt.
6. Close and reload the game.
7. Verify you still have the trial omen effect and go into survival mode
8. ❌ you will now only need to defeat 1 zombie to get the reward.
9. Optional: ✔ Repeat the process with a different number in ominous_config.total_mobs and verify that it does get saved properly.
Can confirm.