I have been working with Proton Sheets to ensure it is a replacement for Google Sheets. I desperately want the security that Proton offers. However, I have noticed that no matter how I go about it, when I add a row to an existing spreadsheet, some of the rows that get moved down lose their formatting and go blank. Re-formatting those rows using Proton Sheets formatting does not fix this; if another row is added, that row will still look blank (the text formatting seems to go to white, and thus can't be seen). Also, it seems some of the dependent formulae in elsewhere in the Sheet will not update relative references to account for the additional rows. This is very hard to troubleshoot to be confident all existing formulae remain correct.

This is on an imported spreadsheet (downloaded from Sheets in XLSX, then imported to Proton Drive).

Is this a known issue? I can consistently recreate this issue.

Thanks for all you do. I'm hoping Sheets can be brought up to be a full replacement.