Summary

Same issue in MC-269986

The top texture of the inactive ominous trial spawner is mirrored, making it inconsistent with its active forms and non ominous spawners. This is an issue with the texture, not the model.

Addons/Resource packs: no

Attachments: Yes

Steps to reproduce

1. Place a normal trial spawner and then use ominous potion
2. Place no hostile mobs to trial spawner and then set survival mode
3. Go back to creative after the trial spawner is ominous and then place another trial spawner to right any rotation

Easy steps method

1. Use the Command in following 

   /setblock <Position> trial_spawner ["ominous"=true]

1. Place down the normal trial spawner at right nearby

Observed result

The Inactive Ominous trial spawner is mirrored

Expected Behavior

The Inactive Ominous trial spawner would like match the top texture same as normal trial spawner to make consistent top of texture

Texture overview