when a spawner gets hit with a breeze charge (on a server with no mob griefing and with explosions (even tnt) not destroying blocks) the spawner drops itself but still is placed in the world, meaning that if a placed zombie spawner gets hit by a breeze wind charge, it drops another one, so now you have 2 zombie spawners.
server version is 1.21 paper
when a spawner gets hit with a breeze charge (on a server with no mob griefing and with explosions (even tnt) not destroying blocks) the spawner drops itself but still is placed in the world, meaning that if a placed zombie spawner gets hit by a breeze wind charge, it drops another one, so now you have 2 zombie spawners.
server version is 1.21 paper