If you build a Powered Spawner it can be placed and Spawns Mobs but it cant be raplaced.
Meaning it will not drop the item?
Im guessing this is a Bug?

Version: Industrial Reborn 1.20.1-1.1
Downloadsite: https://modrinth.com/mod/industrialreborn/version/OlXXoERL

Unfortunately the Modrinth version is outdated. At this time I'm unable to create a new release on Modrinth due to a site error. I will try again later. Until then, you may use Curseforge to download the newest version (1.3.1), if possible.
Until then you can use the wrench from Tech Reborn to dismantle the machine.