You can check the log, pool sends the same header (job) for a long time:

23:01:14:327   16cc   got 243 bytes
23:01:14:338   16cc   buf: {"id":0,"jsonrpc":"2.0","result":["0x56c1b889948349b145171845df85cbaae42e2052393518da6e68fe4c652a27f3","0x013d5197a3a035144a79e3e09dfec2505039ed176d81a0957e229886ddbee49b","0x00000000dbe6fecebdedd5beb573440e5a884d1b2fbf06fcce912adcb8d8422e"]}

......

23:43:57:438   16cc   got 243 bytes
23:43:57:451   16cc   buf: {"id":0,"jsonrpc":"2.0","result":["0x56c1b889948349b145171845df85cbaae42e2052393518da6e68fe4c652a27f3","0x013d5197a3a035144a79e3e09dfec2505039ed176d81a0957e229886ddbee49b","0x00000000dbe6fecebdedd5beb573440e5a884d1b2fbf06fcce912adcb8d8422e"]}
 
42 minutes it sends the same job. Moreover, it accepts shares for this job all the time:

23:09:02:904   16cc   got 36 bytes
23:09:02:912   16cc   buf: {"id":4,"jsonrpc":"","result":true}
23:09:02:922   16cc   parse packet: 36
23:09:02:940   16cc   ETH: Share accepted!

.....

23:40:44:596   16cc   send: {"id":4,"method":"eth_submitWork","params":["0x75e8cb19ab613cb4","0x56c1b889948349b145171845df85cbaae42e2052393518da6e68fe4c652a27f3","0xfc152e9f3155f53c75a270b7db26d6b63fec19c54318a49ec1513246cf14479e"]}
23:40:44:725   16cc   got 36 bytes
23:40:44:728   16cc   buf: {"id":4,"jsonrpc":"","result":true}
23:40:44:728   16cc   parse packet: 36
23:40:44:737   16cc   ETH: Share accepted!

The problem is not in my miner. The only problem with my miner is that it should understand that entire pool (or at least its thread that serves you) hangs and disconnect, I will add it.