Trial spawners do not work when mob spawning is turned off. I placed the spawner and a mob inside and they wouldn’t spawn until I updated the do mob spawning game rule to true. Regular spawners work normally though.
I tried to attach a recording but it didn’t work
It’s 100% normal, mobs c’ant spawn when there is “/gamerule domobspawning false…
I just checked and I was wrong, aparently, but I still don’t know how to solve this,
sorry