Mobs dont spawn under spawner?

[Project-Econome]

Apparently mobs only spawn onto of spawner and not both top and bottom you could solve this by making them spawn in air on the sides?

[DayKoala]

Hello, unfortunately this will not be possible, as it would cost more attempts for the Spawner to be able to define a valid location, thus consuming more process on your server, by default they can spawn a block above and a block below according to the position from the Spawner.

[Project-Econome]

Hmm why not make it using a ring method of points to spawn like hitboxes point outwards