Saving of removed actors which are instantly spawned by a voxel mesh spawner

[termiimret]

I'm having issues with the saving of actors which are spawned by a voxel mesh spawner.
I have setup a voxel spawner to always spawn the actor.
First, I destroy the actor and then save using the spawner save.
However, after quitting and restarting (and loading the world & voxel spawner), the previously destroyed actor is still respawned by the voxel spawner.
I'm using UE 4.25.1 and the Voxel Plugin Pro version from the marketplace.
Is there something else I need to do for the removal/destruction of actors spawned by a voxel mesh spawner to be saved?