I think we have a Vardiff maximum difficulty issue.    From how things look,  the minimum difficulty on the siacoin pool is set to 1.  I think A3s are solving so many diff 1 shares so fast that the server is disconnecting thinking it's a flood.

Miningpoolhub, any way you can look at this?  Siacoin is in desperate need of pool diversity right now.

My A3 is getting 127 difficulty from other pools.