CVX preprocessing time before calling Mosek is 90 minutes, while Mosek afterwards runs for 1 minute.

Is there a way to tell CVX to keep the preprocessing simple?

More details:

I have two different computers. They run the same CVX version, but one runs Matlab 2013a and the other runs Matlab 2015a. The preprocessing time before calling Mosek for the 2013a computer is a few seconds and for the 2015a computer is 90 minutes. In both cases Mosek afterwards runs for 1 minute.