Repetition of Rows in Table View (Data from Google Sheets)

I'm retrieving records from a Google Sheet, and displaying them in a table view in a Looker Studio report. There are no joins or any trickery with the data being retrieved from the Google Sheet - it is simply a straightforward list of data. There are some calculated fields, control fields and conditional formatting that I've added in the Looker Studio report - but that's about as fancy as it gets.

I've examined the Google Sheet and double checked and can't see any reason why this data would be duplicated.

Has anybody else experienced this? Was there a fix?

This sounds similar   https://support.google.com/looker-studio/thread/124887809/duplicate-values-in-table-visualization-in...

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