Latest update has broken Stocks widgets

I use the Stocks app widgets to keep track of my stocks - I have one widget for each holding. Up until yesterday's update they were working fine. Since the update however, they initially were not working at all (white widget with SYMBOL failed) text. Today, for some weird reason some of them are working again, but one widget for one particular stock is not. The data is there because if I click on the widget it opens the data for that holding in a new window, BUT the widget itself is displaying nothing - the white widget with text as above. I have tried deleting them all and recreating but it has made no difference.

Has anyone else experienced this? I was in a chat with Apple about it yesterday, but they dropped the chat on me.