I just updated to 7.4.0 -> 7.5.0 and in uptime I now see below the query bar the warning
There was an error retrieving the index pattern
But I can see all 100+ monitors and can filter on location. But the query bar is grey out and is disabled.
I have made sure that the 2 heartbeats are updated to 7.5 and rerun the setup just to make sure.
I also tried to delete all kibana indexes and restart kibana no such luck
Of note is that this is running in a air gaped environment and so I disabled newsfeed and telemetry