I talked about this in another thread in Bug Reports: Some boosted techs/civics has the "BOOSTED" text with its proper fill highlighted color. Others don't show the fill color at all, but has the filled arrow and the filled semi-circle. This happens so randomly that it can't be fixed. Quill18 noticed this too on one of his preview playthroughs (I think it was Rome). When clicking on a unit, you can click elsewhere to deselect it. However when clicking on a city, you cannot click elsewhere to de-select the city. On a coastal city, I had one water tile that had a resource, so I could not get a harbor district. However on the city screen it would not show me other tiles that I can purchase where I could build the district.