Noticed a problem that the payout was not coming through. And indeed restarted the server, still going through the logs. It seems to be related with the Nu deamon. Server.py logs are fine.
Automatic payout is just coming through. This is new 
Nu daemon was running but not responsive.
Edit: disk transfers tied to the Nu daemon were as high as 25Mb/s sustained before the restart most likely causing I/O issues. Not clear what caused that, appears to be no errors in the debug.log. Hope I can find something else. Might need to update to Nu 2.1.1. Still running on 2.0.3.