I wanted to try today MultiPoolMiner but got not-described error: "Index was out of range. Must be non-negative and less than the size of the collection". Waiting on Github for a possible solution...
So, I tried Multi-algo switch mining (Port 12XXX) different algo coins by using Hub feature,via the hub worker -- Claymore miner @ us-east-equihash-hub.miningpoolhub.com:12023 (SSL/TLS)
and after some time the miner would give first:
"...
Stratum -- reading socket failed 0, disconnect
ZEC: Connection lost, retry in 20 sec...
..."
then, the attempt to connect with the message "ZEC: Stratum -- Connected"
and then
"...
ZEC: Authorization failed
: {"id":2."result":false,"error":null}
..."
Happened few times today. Before, I was mining non-stop BTG (port 20595) for 10 days without a single error (and only 7 rejected shares). So, I am afraid to leave this switching miner on for the night; went back to a single-coin (btg).

Is it me? Or the servers' updates did do some bad service?..