Can anyone think of why all the filling has sunk to the bottom of the cake and why my cake has sunk in the middle? It was rising just fine until the minute 45 mark when I covered it with the buttered foil, and when I took it out at 55 minutes, it had sunk terribly. My oven temp was exactly 350º- and the covering of the cake took less than 10 seconds. What could have gone wrong? I must admit, it’s absolutely delicious, just an eyesore!