V0.3.0 keeps the connection and do not response anything

Hello. nano-work-server:V0.3.0 keeps the connection and do not response anything.

curl http://127.0.0.1:7000/ --data-raw '{"action":"work_generate","hash":"<HASH>"}'

CPU 48 RAM 120GB

logs

Generated for E37CC5A72D5CE68B01473AE832283DC3081F13AD119B8B2564D5A0DF491A9987 in 1332949971ms for difficulty fffffff800000000
Generated for FC271CE34C48DB357186C5D742A23D5030D334FD066D07BEEC4FD3B46D38E0AC in 1332948571ms for difficulty fffffff800000000
Status {"generating":"1","queue_size":"100750"}
Status {"generating":"1","queue_size":"100750"}
Status {"generating":"1","queue_size":"100750"}
Status {"generating":"1","queue_size":"100750"}
Status {"generating":"1","queue_size":"100750"}

Work file after node restart.