I can confirm there is an issue with Sia pool initially when Claymore Dual is launched but fixes itself within a minute or so.
SC: Stratum - Connected (europe.hub.miningpoolhub.com:20550)
SC: Received unknown response: {"id":null,"method":"mining.notify","params":["41dd","0x6b6564206265666f726520
69742063616e2062652075736564227d0a","0x0000000012533fe68fd3d1cfe47445abdce0b117994feb3fbbe16e3d0f675ad9",true]
}
SC: Authorized