..... First all is ok, and it, just made several requests:

wait for reply:  5882224 1 false true true
wait for reply: 5882224 1  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply 5882224 NAM finished: "Unknown error"  error: QNetworkReply::NoError
reply  5882224 1  is ok QNetworkReply::NoError "Unknown error" false
replay:  5882224 1 ============================ fully finished=========================
wait for reply:  6047336 2 false true true
wait for reply: 6047336 2  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply 6047336 NAM finished: "Unknown error"  error: QNetworkReply::NoError
reply  6047336 2  is ok QNetworkReply::NoError "Unknown error" false
replay:  6047336 2 ============================ fully finished=========================
wait for reply:  6020944 3 false true true
wait for reply: 6020944 3  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply 6020944 NAM finished: "Unknown error"  error: QNetworkReply::NoError
reply  6020944 3  is ok QNetworkReply::NoError "Unknown error" false
replay:  6020944 3 ============================ fully finished=========================
......

wait for reply:  6055704 10 false true true
wait for reply: 6055704 10  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply 6055704 NAM finished: "Unknown error"  error: QNetworkReply::NoError
reply  6055704 10  is ok QNetworkReply::NoError "Unknown error" false
replay:  6055704 10 ============================ fully finished=========================
... here I remove cable from device

wait for reply:  6035536 11 false true true
wait for reply: 6035536 11  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply  6035536 11  not finished: QNetworkReply::UnknownNetworkError "Invalid argument" true
replay:  6035536 11 ============================ fully finished=========================
wait for reply:  6028312 12 false true true
wait for reply: 6028312 12  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply  6028312 12  not finished: QNetworkReply::HostNotFoundError "Host  not found" true
replay:  6028312 12 ============================ fully finished=========================
wait for reply:  6055704 13 false true true
wait for reply: 6055704 13  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply  6055704 13  not finished: QNetworkReply::HostNotFoundError "Host  not found" true
replay:  6055704 13 ============================ fully finished=========================
wait for reply:  6042760 14 false true true
wait for reply: 6042760 14  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply  6042760 14  not finished: QNetworkReply::HostNotFoundError "Host  not found" true
replay:  6042760 14 ============================ fully finished=========================
wait for reply:  6046384 15 false true true
wait for reply: 6046384 15  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply 6046384 NAM finished: "Host  not found"  error: QNetworkReply::HostNotFoundError
reply  6046384 15  is ok QNetworkReply::HostNotFoundError "Host  not found" false
replay:  6046384 15 ============================ fully finished=========================
wait for reply:  6042760 16 false true true
wait for reply: 6042760 16  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply 6042760 NAM finished: "Host  not found"  error: QNetworkReply::HostNotFoundError
reply  6042760 16  is ok QNetworkReply::HostNotFoundError "Host  not found" false
replay:  6042760 16 ============================ fully finished=========================
wait for reply:  6046384 17 false true true
wait for reply: 6046384 17  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply 6046384 NAM finished: "Host  not found"  error: QNetworkReply::HostNotFoundError
reply  6046384 17  is ok QNetworkReply::HostNotFoundError "Host  not found" false
replay:  6046384 17 ============================ fully finished=========================
wait for reply:  6042760 18 false true true
wait for reply: 6042760 18  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply 6042760 NAM finished: "Host  not found"  error: QNetworkReply::HostNotFoundError
reply  6042760 18  is ok QNetworkReply::HostNotFoundError "Host  not found" false
replay:  6042760 18 ============================ fully finished=========================
wait for reply:  6046384 19 false true true
wait for reply: 6046384 19  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply 6046384 NAM finished: "Host  not found"  error: QNetworkReply::HostNotFoundError
reply  6046384 19  is ok QNetworkReply::HostNotFoundError "Host  not found" false
replay:  6046384 19 ============================ fully finished=========================
..... Here i insert cable back
replay:  6015008 49 ============================ fully finished=========================
wait for reply:  6046384 50 false true true
wait for reply: 6046384 50  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply 6046384 NAM finished: "Host  not found"  error: QNetworkReply::HostNotFoundError
reply  6046384 50  is ok QNetworkReply::HostNotFoundError "Host  not found" false
replay:  6046384 50 ============================ fully finished=========================
.... come ONE FIRST ERROR, with inserted cable:

wait for reply:  6015008 51 false true true
wait for reply: 6015008 51  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"
reply 6015008 NAM finished: "Network unreachable"  error: QNetworkReply::UnknownNetworkError
reply  6015008 51  is ok QNetworkReply::UnknownNetworkError "Network unreachable" false
replay:  6015008 51 ============================ fully finished=========================
.... and we wait infinity...... And it never exit:
wait for reply:  6046384 52 false true true
wait for reply: 6046384 52  part 2 false true true
reply error status: QNetworkReply::NoError "Unknown error"