Looker randomly failing connecting to data that supposed to be cached

[weiners7878]

It's obvious Looker is unstable, but what I get isn't normal, so I must be missing something.

I keep getting a Data Set Configuration Error. Looker Studio cannot connect to your data set.

I load my data with PostgreSQL connectors.  It's set to refresh every 12 hours.

On the same page, I feed several charts with data from the same data source. I'd expect either all of them to display the data or all of them to fail. However, some display data and some an error. Since that data was loaded successfully and is showing up in some charts, it doesn't make sense.

What am I doing wrong? It looks like every chart is loading data by itself.