When a statue is within the world, the command to turn off Better Spawning via /spawner off doesn't work -- couldn't quite find if this is intended or a known issue, so I put it here.
Nothing in the logs (that I've seen) seem to show any errors, like, it even flat-out says that spawning is turned off, so sorry that there's not much to go off of here.

Hi there! Thanks for your report :)

Could I have a little more info, please? I'm not able to reproduce this issue on a normal singleplayer or multiplayer map (statue or no statue). What kind of map type are you using?

I am able to reproduce it on superflat maps without statues, so at the very least, I can pass that issue on for superflats.

Thank you!

That's strange. Well, I used a superflat map, and also spawned in two custom NPCs: an "equal" boss trainer and a chatting NPC, before spawning in a Beedril statue that was animated. It was when I spawned in that statue that despite me turning spawning off, Pokemon still were spawning. I removed the statue later, and then it worked again.
That gives more info, right?

Ahhh I think the command is just bugged with superflat worlds then, as I didn't need to spawn in any statues or npcs at all :)

So, forwarded to internal! Thanks :D