Sorry for the late answer. Then, I guess there's something broken.
For example, this just happened: I clicked on pre-heat, waited a bit and then I clicked on "send job to the printer"
The nozzle temperature reached the 230ºC correctly and there it stoped, but the bed didn't reach the 60ºC. So, in the time cura was "exporting" the bed temperature kept rising up, and when the job finally got imported to the printer the bed temperature reached up 71ºC.. It didn't cut it off automatically at 60ºC.
Again, the only way I found to avoid this, is to wait until both temperatures get to the setted temperature, wait for cura to export the job, and then wait for a bit for the printer to reach both temperatures again (because now it does the inverted job, temperature decreases when cura is exporting to the printer)
I will keep doing it that way to avoid any possible hardware problem because of any excessive temperature.