A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I’m sorry you’re dealing with this. I can see from the screenshot that applying bold to part of the cell causes the rest of the text to become compressed, and having to reformat every sentence is certainly not a reasonable workaround.
Since you’re using an Insider version, could you share your exact Excel version and build number under Excel > About Microsoft Excel, along with your macOS version? Also, does this occur in a new blank workbook and with different fonts? This will help determine whether the behavior is related to the current Insider build, the workbook, or a particular font.
Thank you for your time