Cheesecakes will shrink a little bit when they come out of the oven. Also, when baking, it will shrink a little bit when it expands to the highest point. If it shrinks a lot, then you overbaked it, so check your baking temperature and time.

As for the baking crack, this is also very normal, slight cracking does not affect, because after the cold cracks will close themselves, if it is very cracked Riha, into a big valley, this reason is more, there are a few:

1, the egg white playing hard;

2, the cheese paste and egg white mixing time did not mix well;

3, the small oven temperature itself is Uneven;

4, too high a temperature on the fire or baking time is too long to cause the surface to dry and crack