How to prevent embedded Google Sheets defaulting to the first sheet?

[Jake May]

I'm attempting to embed a link to a range of cells in a sub-sheet from a Google Sheets spreadsheet into a Confluence page.

Whether pasting the link directly or using the Google Sheets Macro, upon publishing the page the embedded sheet defaults back to the first sub-sheet in the file, ignoring the specified range. 

This was working fine up until a few days ago, I could just paste the link and it would automatically embed the sheet, correctly displaying the specified cells. Then that stopped working, (only showing the first sub-sheet) and I had to use the macro. Now that's stopped working too. Has something changed in a recent update that could be causing this?