The reactive portion of the model seems not to run

Hi! I'm a new user of this interesting forum. I'm trying to simulate a diagenetic process by using PetraSim 5.4 (TOUGHREACT and EOS3). Therefore, for each new simulation, I increased the temperature and pressure each 5 ºC and 20 atm respectively, beginning at 25 ºC. I use the option "Restart options" and consequently my initial conditions are the SAVE and savechem from the previous simulation. All is OK up to 70 ºC, but for 75 ºC the reactive portion of the model seems not to run since the run time of the simulation is almost instantaneous. I send you attached the simulation. Can you have any idea of what is happening?

Thank you very much in advance!