Currently I am getting errors like the following quite often:
This cluster had issues returning data and results might be incomplete.
error fetching [journald.custom.syslog_timestamp]: Field [journald.custom.syslog_timestamp] of type [flattened] doesn't support formats.
I am not sure what causes them or what to look for. Are these errors in the index? Or in fields that Kibana wants to display, but can't?