How about the “process-buffer dump” under the system/Nodes Actions button
Mine show idle but I have seen things in there when the server was hung up - how does input/process/output buffer processing look for all nodes? Anything hanging up in the buffers? What is the utilization at? possibly six hours back on processing?
EDIT: If you search absolute time 6-8 hours in the future, do you get current messages?
EDIT2: What are the results of $sudo timedatectl (from reading through here… old but may still be relevant)