Calculates proofs for many different and past blocks

since Saturday 9 December 1 am, 1 of my member node continues to calculate even when it is excluded, it tries to calculate proofs for a lot of past blocks ! And yet it is well synchronized with the rest of the network on block 76348. It's so weird !

2017-12-09T20:48:08+01:00 - info: POST Peer 2t6NP6Fvvu#76319 to 10 peers
2017-12-09T20:48:09+01:00 - info: Matched 3 zeros 000674C083277FC715D9D280CE17D7F7E4BC267A5A7996278BFA7E693C13203A with Nonce = 30400000020777 for block#76219 by D9D2za
2017-12-09T20:48:10+01:00 - info: ✔ PEER DfjVNNn7
2017-12-09T20:48:10+01:00 - info: POST Peer DfjVNNn7JW#76319 to 10 peers
2017-12-09T20:48:11+01:00 - warn: Could not reach duniter.floth.fr:80, reason: Unexpected token < in JSON at position 0
2017-12-09T20:48:11+01:00 - warn: Could not reach duniter.floth.fr:80, reason: Unexpected token < in JSON at position 0
2017-12-09T20:48:13+01:00 - info: Matched 3 zeros 0001882C0BBAB887823AB8E119C8EE8E272DBB61AFA318744EAC81AC6B2C19C1 with Nonce = 30100000234023 for block#76161 by D9D2za
2017-12-09T20:48:14+01:00 - warn:  httpCode=400, ucode=1005, message=Document has unkown fields or wrong line ending format
2017-12-09T20:48:14+01:00 - info: Matched 3 zeros 000C970400951C1D631C3EFFCD79FD50CEAE7BEA53EF3CAF0608D0B3D10A264A with Nonce = 30100000234469 for block#76161 by D9D2za
2017-12-09T20:48:15+01:00 - info: Matched 3 zeros 0004907B9F9B19D88BA57A66CB6E99B4766ED9346F2F6D0000C7AADD6CD53F87 with Nonce = 30100000234579 for block#76161 by D9D2za
2017-12-09T20:48:15+01:00 - info: POST Peer Be1eVp7etV#76348 to 1 peers
2017-12-09T20:48:15+01:00 - info: ✔ PEER Be1eVp7e
2017-12-09T20:48:15+01:00 - info: POST Peer Be1eVp7etV#76348 to 10 peers
2017-12-09T20:48:19+01:00 - info: Matched 3 zeros 000AD639C259CC049C4C023AFD676DC4DF5D922B34A68F2144D90286B21FEB80 with Nonce = 30300003184833 for block#76157 by D9D2za
2017-12-09T20:48:19+01:00 - info: Matched 3 zeros 0005272B7B42765F75581E21F4E8FF40B46BEA538839BC44806E044942796DEE with Nonce = 30200000433995 for block#76156 by D9D2za
2017-12-09T20:48:23+01:00 - info: Matched 3 zeros 000A117999F8B3C8F345CEA2D8613434BF54C0F29E9FE566D8928AB234F2DCC1 with Nonce = 30300003186040 for block#76157 by D9D2za
2017-12-09T20:48:25+01:00 - warn: ETIMEDOUT
2017-12-09T20:48:25+01:00 - warn: ETIMEDOUT
2017-12-09T20:48:25+01:00 - info: Peer Be1eVp7etVfA7cT6er6dcJ9d5KxGJVY2tzCGGCAz3yG unreachable: now considered as DOWN.
2017-12-09T20:48:27+01:00 - info: Matched 3 zeros 000C27F8E97A77DDD1B944ED66BC7C2C03F466331EBCEB00FBF1B63E43F228D3 with Nonce = 30100000233011 for block#76163 by D9D2za
2017-12-09T20:48:28+01:00 - info: ✔ PEER 9zCYjVtP
2017-12-09T20:48:28+01:00 - info: POST Peer 9zCYjVtPFz#76318 to 10 peers
2017-12-09T20:48:28+01:00 - warn: Could not reach 167.114.232.189:10901, reason: Unknown reference block of peer
2017-12-09T20:48:31+01:00 - warn: Could not reach duniter.floth.fr:80, reason: Unexpected token < in JSON at position 0
2017-12-09T20:48:33+01:00 - info: ✔ PEER 4fHMTFBM
2017-12-09T20:48:33+01:00 - info: POST Peer 4fHMTFBMo5#76319 to 10 peers
2017-12-09T20:48:33+01:00 - warn: Could not reach 167.114.232.189:10901, reason: Unknown reference block of peer
2017-12-09T20:48:35+01:00 - info: Matched 3 zeros 000BC1DDE8F8F8018A102305BA290A1E283E8323A7525332A72AE4C7FCBB0053 with Nonce = 30400000020803 for block#76258 by D9D2za
2017-12-09T20:48:42+01:00 - info: Matched 3 zeros 0008D3706435B5A3A5274ABE0725D1712C694A5C659554D7B1F7D6D467098CAB with Nonce = 30300003191112 for block#76157 by D9D2za
2017-12-09T20:48:42+01:00 - info: Pulling blocks from the network...
2017-12-09T20:48:42+01:00 - info: Peer 48SLtTLL3CxAXUcmbKwp2PUg1hUvEh2s5EwEpRh8RaoR unreachable: now considered as DOWN.
2017-12-09T20:48:43+01:00 - info: Matched 3 zeros 00074786ECF9FDD67D0639CFEC68AE440C2C1D2DB0DF38B4177413549F5EC8FF with Nonce = 30300003191385 for block#76157 by D9D2za
2017-12-09T20:48:45+01:00 - info: ✔ PEER 38MEAZN6
2017-12-09T20:48:45+01:00 - info: POST Peer 38MEAZN68P#76319 to 10 peers
2017-12-09T20:48:45+01:00 - warn: Could not reach 167.114.232.189:10901, reason: Unknown reference block of peer
2017-12-09T20:48:46+01:00 - info: Matched 3 zeros 000B5705E7B03D3539DFD9902B8B187023209B37E70D8AE6B19B25443BD15313 with Nonce = 30400000020851 for block#76268 by D9D2za
2017-12-09T20:48:48+01:00 - warn: Could not reach duniter.floth.fr:80, reason: Unexpected token < in JSON at position 0
2017-12-09T20:48:49+01:00 - info: Matched 3 zeros 000854D6EDED4FD7D9EACF4C7B85339952947498CDC809AA0F30ABA00B5D9EEE with Nonce = 30100000234230 for block#76165 by D9D2za
2017-12-09T20:48:52+01:00 - info: Peer Com8rJukCozHZyFao6AheSsfDQdPApxQRnz7QYFf64mm unreachable: now considered as DOWN.
2017-12-09T20:48:52+01:00 - info: Matched 3 zeros 0009358457521339F8751B7763E5CF0F708F6F153890347EEAC33604F4AFC0C0 with Nonce = 30400000020868 for block#76274 by D9D2za
2017-12-09T20:48:52+01:00 - info: Block resolution: 0 potential blocks after current#76348...
2017-12-09T20:48:52+01:00 - info: Will pull blocks from the network in 9 min 59 sec
2017-12-09T20:48:52+01:00 - info: Matched 3 zeros 0007B694F567EF68BD70C00016B1384E0BF99E2C779E68405812923A21532531 with Nonce = 30100000232648 for block#76166 by D9D2za
2017-12-09T20:48:53+01:00 - info: Matched 3 zeros 000D8D22CA7396CBABC0F99E32D458E4F6DB7FCF155DE03BBBEF5C63E27EEB41 with Nonce = 30400000020983 for block#76274 by D9D2za
2017-12-09T20:48:56+01:00 - info: WS2P D9D2zaJoWYWveii1JRYLVK3J4Z7ZH3QczoKrnQeiM6mx: new incoming connection from 127.0.0.1:44909!
2017-12-09T20:48:57+01:00 - info: WS2P: established incoming connection from D9D2zaJo 127.0.0.1:44909
2017-12-09T20:48:58+01:00 - info: Matched 3 zeros 00014A7533480CF628902112B4D497A7BA09EA2041DE4FA004438A03ED21B3E0 with Nonce = 30300003195709 for block#76157 by D9D2za
2017-12-09T20:49:00+01:00 - info: Matched 3 zeros 0009E6BFAD920EB08C9ED861143CDEA3604D3A644150B92971AE5EDC209F6E25 with Nonce = 30200000431807 for block#76159 by D9D2za
2017-12-09T20:49:01+01:00 - info: worker 31956 died with code null and signal SIGINT