Claymore is closing itself (or crashing)?

23:45:55:363   10d4   XMR: Stratum - Connected (cryptonight.jp.nicehash.com:33355) (SSL/TLS)
23:45:55:645   10d4   got 79 bytes
23:45:55:645   10d4   buf: {"id":1,"jsonrpc":"2.0","error":{"code":-1,"message":"Internal server error"}}

23:45:55:645   10d4   parse packet: 76
23:45:55:645   10d4   Error in server response
: {"id":1,"jsonrpc":"2.0","error":{"code":-1,"message":"Internalservererror"}}
23:45:55:645   10d4   buf was cleared
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After that, the miners is closed. The error handler should try reconnect infinitely after x seconds instead.