okay. I checked. There were no any found shares for 35minutes after devfee. That's time was displayed like 0h/s on the graph, but my rig worked and was getting the job just couldnt find any shares because too high difficulty.
from 12:10 to 12:45  "Job changed, drop current round" only
then only at 12:46 found share and my hashrate recovered...

12:09:41:685   1b30   DevFee: XMR: Stratum - connecting to 'pool.minexmr.com' <188.165.199.78> port 3333 (unsecure)
12:09:41:763   1b30   DevFee: XMR: Stratum - Connected (pool.minexmr.com:3333) (unsecure)
....
12:09:41:982   1b30   DevFee: start mining (54sec)
12:09:41:982   1b30   Devfee pool share target: 0x000053e2 (diff: 200007H)
12:09:46:826   1b30   socket was closed remotely
12:09:46:826   1b30   DevFee: XMR: Connection lost, retry in 20 sec...
12:10:06:843   1b30   DevFee: XMR: Stratum - connecting to 'pool.minexmr.com' <188.165.199.78> port 3333 (unsecure)
12:10:06:952   1b30   DevFee: XMR: Stratum - Connected (pool.minexmr.com:3333) (unsecure)
......

12:10:07:062   1b30   Devfee pool share target: 0x000053e2 (diff: 200007H)
12:10:07:108   14fc   Job changed, drop current round
12:10:07:108   1810   Job changed, drop current round
12:10:07:108   127c   Job changed, drop current round

12:10:08:546   1a00   GPU0 t=56C fan=36%, GPU1 t=57C fan=35%, GPU2 t=50C fan=36%
12:10:08:546   1a00   em hbt: 0, fm hbt: 0,
12:10:08:546   1a00   watchdog - thread 0, hb time 1391
12:10:08:546   1a00   watchdog - thread 1, hb time 219

12:10:08:593   1b30   socket was closed remotely
12:10:08:593   1b30   DevFee: XMR: Connection lost, retry in 20 sec...
12:10:28:610   1b30   DevFee: XMR: Stratum - connecting to 'pool.minexmr.com' <188.165.199.78> port 3333 (unsecure)
12:10:28:704   1b30   DevFee: XMR: Stratum - Connected (pool.minexmr.com:3333) (unsecure)
12:10:28:797   1b30   got 303 bytes
12:10:28:797   1b30   buf: {"id":1,"jsonrpc":"2.0","error":null,"result":{"id":"817473455362639","job":{"blob":"060683dbcfd005cad45b0306350a730b0354d52f1b6d671063824287ce4a82c971d109d56d1f1b0 0000000ea8abe6b048e909ac3d70904e277e57be4bdf87f944135c8fa9feec754acfa9116","job_id":"278606961922368","target":"e2530000"},"status":"OK"}}
12:10:28:797   1b30   parse packet: 302
12:10:28:797   1b30   new buf size: 0
12:10:28:797   1b30   Devfee pool share target: 0x000053e2 (diff: 200007H)
12:10:28:829   11d4   Job changed, drop current round
12:10:28:829   127c   Job changed, drop current round
12:10:28:829   14fc   Job changed, drop current round

12:10:30:235   1b30   socket was closed remotely
12:10:30:235   1b30   DevFee: XMR: Connection lost, retry in 20 sec...
12:10:39:407   1a00   GPU0 t=56C fan=36%, GPU1 t=57C fan=36%, GPU2 t=50C fan=36%
12:10:39:423   1a00   em hbt: 0, fm hbt: 9188,
12:10:39:423   1a00   watchdog - thread 0, hb time 703
12:10:39:423   1a00   watchdog - thread 1, hb time 3953

12:10:50:252   1b30   DevFee: XMR: Stratum - connecting to 'pool.minexmr.com' <188.165.199.78> port 3333 (unsecure)
12:10:50:345   1b30   DevFee: XMR: Stratum - Connected (pool.minexmr.com:3333) (unsecure)
12:10:50:455   1b30   got 303 bytes
12:10:50:455   1b30   buf: {"id":1,"jsonrpc":"2.0","error":null,"result":{"id":"116941850420217","job":{"blob":"060699dbcfd005cad45b0306350a730b0354d52f1b6d671063824287ce4a82c971d109d56d1f1b0 0000000c792993548e0bebd3c9425f6cafaa0cc3e5798b1e008c9e6371572a0cd02469616","job_id":"137751536901858","target":"e2530000"},"status":"OK"}}

12:10:50:455   1b30   parse packet: 302
12:10:50:455   1b30   new buf size: 0
12:10:50:455   1b30   Devfee pool share target: 0x000053e2 (diff: 200007H)
12:10:50:455   1b30   DevFee: stop mining and disconnect
12:10:50:533   15a0   Job changed, drop current round
12:10:50:533   1268   Job changed, drop current round
12:10:50:533   1a74   Job changed, drop current round

12:11:03:268   1834   got 253 bytes
12:11:03:268   1834   buf: {"jsonrpc":"2.0","method":"job","params":{"blob":"0606a9dbcfd005e456bce603e25244d0ae621a37059e6ff8579f79fdc44e4849d83dab652f42280 0000000da66a58e017683ecf9de789b4f42a552eae51b1018bb4ee7216a864b147d4ef217","job_id":"583816095091214","target":"c6100000"}}

12:11:03:268   1834   parse packet: 252
12:11:03:268   1834   new buf size: 0
12:11:03:268   1834   XMR: 11/21/17-12:11:03 - New job from pool.minexmr.com:3333
12:11:03:268   1834   target: 0x000010c6 (diff: 1000225H)
12:11:03:268   1834   XMR - Total Speed: 2508 H/s, Total Shares: 193, Rejected: 0, Time: 20:15
12:11:03:268   1834   XMR: GPU0 853 H/s, GPU1 851 H/s, GPU2 804 H/s
12:11:03:596   15a0   Job changed, drop current round
12:11:03:596   13c8   Job changed, drop current round

12:45:13:735   1a00   watchdog - thread 11, hb time 3954
12:45:20:580   1a74   XMR: put share nonce 1f233
12:45:20:580   1a74   XMR round found 1 shares
12:45:20:595   1834   XMR: 11/21/17-12:45:20 - SHARE FOUND - (GPU 0)