hi @lions04 and all 
We’re aware of this. It’s due to an update that Google pushed. It’s because our logo is embedded in many sheets in the template using a URL reference (=image) that’s pointing to where the image is stored in our Google cloud storage, which is an “external” location to the Google Sheet.
We will be working to update that in the coming weeks to use a different embed method so that it doesn’t appear anymore.