Hello,
I’m having trouble reproducing this.
I’ve enabled Physics (as mentioned in your other bug report)
I placed a VFX Spawner with Effect Type Continuous → Disco Balls and they appeared as expected.
Do you need to place the VFX Device a certain distance away from your spawn?
I also tried with Effect Type Burst → Explosion Large (Restart function referencing a button press) and that also worked.
Does this only happen when the VFX spawner is referenced with an @editable in Verse?