I'm on Bedrock Windows 10 edition, and I also had a similar situation where the ominous effect ended, but the trial spawner continued to spawn zombies with gear. However, the amount of mobs, and the particle effects were that of a normal trial spawner. Also, there were no potion effects or ominous loot.
I'm on Bedrock Windows 10 edition, and I also had a similar situation where the ominous effect ended, but the trial spawner continued to spawn zombies with gear. However, the amount of mobs, and the particle effects were that of a normal trial spawner. Also, there were no potion effects or ominous loot.