So - this functionality used to work. How do I get it back?
I've checked and Im collecting all the (seemingly) relevant system indexes: .monitoring-[kibana|es|logstack].
When I click on this option in Kibana a panel opens on the right side with repeated text saying:
"Monitoring Request Error
[illegal_argument_exception] Fielddata is disabled on text fields by default. Set fielddata=true on [event.dataset] in order to load fielddata in memory by uninverting the inverted index. Note that this can however use significant memory. Alternatively use a keyword field instead. "