I'm also seeing some sort of failure or disconnection recently on both of my rigs. I've been using this miner for a couple of months now and never had this issue but over the last week it's happened 3 times where the miner just disconnects and closes. I tried running it through Awesomeminer as well and it looks like Awesomeminer will try multiple times to restart it but each time it will fail to connect and then close/crash. If I wait a minute and try again manually it will work as normal. I didn't have logging enabled (but I do now) so I can't say much more than that, but this is the first time this has been happening to me.
When it happens, it happens on both of my nvidia rigs running DSTM. My AMD rig running claymore shows a disconnect, but it recovers. So it's definitely a connection issue with the pool or network connection since claymore shows it too, but DSTM doesn't recover for whatever reason. I've seen DSTM work fine after a pool error or disconnect before though, so I'm not sure what changed.