The preview might not mean that your view is correct. Tableau generates static images and use it as thumbnail. This is true at least for Tableau server. I guess Tableau desktop might have similar feature.
I suggest you to check your views. Also do check if you are able to create new view using same dimensions, measures and filters.
If you have cache issues, refreshing thumbnails can help you.
i guess because you applied the filter and didnt not choose any of the option.