Brand New S9 Won't Work With AntPool or NiceHash, but will with KanoPool

[KWMiner]

My brand new S9 won't show any data on the Miner Status page, shows nothing under Hardware Version or BMminer Version if I point it at Antpool or NiceHash. But if I point it at KanoPool it suddenly comes alive and all the missing information is populated? Any guesses as to what is causing this? I've checked and double checked the URL, Worker, etc.

[VRobb]

And that's a bad thing?  

I'd say your miner is doing you a favor.

[KWMiner]

And that's a bad thing?  

I'd say your miner is doing you a favor.

I guess, but I'd like to know why it's working with some pools and not others. It's working with BTC.com now too