CSS not working

Using this to hide tile titles. Was working fine then stopped while using it last night.
#tile-35 works fine. #tile-78 does not. Any ideas on why?

#tile-78 .tile-title {color: rgba(0, 0, 0, 0); text-shadow: none !important;}
#tile-35 .tile-title {color: rgba(0, 0, 0, 0); text-shadow: none !important;}

is it possible the tile number has changed? One of the biggest problems I have with customizing the dashboard is I was always deleting and re-adding things!

Update to above. If I go to a back up from a few days ago this works fine. Seems like something stopped n CSS