iPad (6th generation)
After clearing a trial chamber with my friends, we went back through to try and do the ominous vaults. We only managed to activate one ominous trial spawner. At this time we discovered the bug where ominous trial spawner mobs do not drop your stuff. This is relevant because after we finished the ominous trial (we received keys, the spawner went dormant) the spawner has continued to spawn monsters (specifically husks) that have the extra gear, and also the delete your stuff glitch. The continuing glitch is how we realized something was wrong, and we then we noticed the better armour and gear. The mobs are the only part of the ominous trial that have continued (no projectiles, blue flames, or ominous reward loot)

Steps to reproduce:

1. Locate a trial chamber.
2. Complete one ominous trial.
3. When the same spawner refreshes (wait for 30 minutes), activate it.

Observed result:
The mobs still spawn with ominous trial gear and an ominous trial specific glitch.

Expected result:
The monsters that spawn are the non-ominous version.