Issue with Looker Studio AppSheet connector

[dan_bergerman]

I'm using the AppSheet connector with Looker Studio. 

The AppSheet app is an employee cost savings app where employees can submit ideas for cost savings. They can upvote ideas, add comments, etc. So there can be a lot of new data coming in each day. 

We have a Looker Studio dashboard that summarizes the data for managers who'll investigate the ideas and work on implementing them where appropriate.

Every day at some point. I don't know when or why, some of the charts will display Unknown data source

If we modify the data range for the data, the charts will load. 

Editing the Data Range Dimension and redropping the data field that it's currently using, also gets the chart to load.

Anyone experiencing similar issues with the AppSheet connector in Looker Studio?