Hangfire with multiple servers - Jobs not getting invoked properly


We have a background process which gets scheduled by hangfire. I could see almost 10 servers in the hangfire dashboard with name like MachineName:Id, but for some reason the job goes to succeeded but actually its not being invoked by hangfire. I added some tracing to the method and found that the method which should be invoked by hangfire is not getting invoked. Can anyone please shed some light into this issue. Also, few servers in hangfire dashboard says started 6 days ago, can it cause any issue ?