I had a match where Green Goblin fortified a tile. I then used Winson’s Gambit and it destroyed the tile but left the fortification on the remaining regular tile. Is this expected behavior? I thought that would remove the fortification instead of removing the tile’s effect. I have a screen-shot of the result.
When GG was released, Kingpin’s black was modified to do exactly what you described. He now converts countdown tiles to basic tiles instead of destroying them.