Column sizing - Size to data - not working

I don’t seem to be able to get this working. I have the option for Column sizing set to Size to data, but I’m constantly having to right-click the resulting data-grid and choose Size to data in order to see my data. It seems to be locked on size to headers no matter what I set it to in the Options/Data Grids/Visual. Is this a known issue, or do I need to change some other setting to get this to work?

Thanks in advance!