Instagram and Facebook stories are distorted when viewing them during phone is unfolded. And to view them while it is folded is annoying sue to small screen.
When this will be fixed?
Have you attempted to force stop and clear on Facebook and Instagram apps?
Navigate to your settings > apps > find and click on Facebook and Instagram app individually > force stop > storage > clear cache.
See if that helps any.
This is related to Samsung Fold new screen sizs. It js clearly mentioned in my topic that stories are not showing properly when device used in unfolded position. It is not related to app data. It is how Samsung Fold displaying the stories on big screen