Gateways Appear In Skyline Dashboard But No Data

[cdav]

I have a graf/prom instance running the Skyline dashboards and I have around 10 gateways and 2 managers successfully streaming data and appearing in the grafana dashboard. 

I have 2 gateways (a cluster) that appear in the dashboard but with no data.

When looking at the metrics being received in prometheus the majority do not contain entries for the gateways in question e.g "system_memory_usage" or "system_cpu_utilisation" but metrics like "cpview_info" do show entries for the gateways.

I have checked on the gateways the following: cpviewexporter version, otelcol version and cpviewapi version all of which are the same as my working gateways. I have also checked the list of metrics using sklnctl and the default are present like the other gateways.

Can anyone help?

Screenshot of dashboard attached