Mobs spawned from Ominous Trial Spawners can drop their armor when killed after they have been transformed

If a mob spawned from an Ominous Spawner transforms, such as a Skeleton freezing in Powder Snow, that transformed mob now has a chance to drop the armor it is wearing.

Steps to Repoduce:

1. Transform a mob wearing armor which was spawned from an Ominous Spawner.
2. Kill that mob.

Observed Results:

That mob has a chance to drop the armor it is wearing.

Expected Results:

That mob should not drop the armor it is wearing like other mobs spawned from Ominous Spawners.

Video:

Recreation.

Notes:

The image shows the armor I obtained from a Stray after it transformed from a Skeleton spawned from an Ominous Spawner.

The video shows me recreating the bug.