Yes it can happen. Be aware under which condition (temperature) you close the case and dont put the case direct into the sun. When you dive you will have the condensation. normal Physical reaction :)
And yes.....between Camera and housing you have space for a small silica-gel pad. But there is no holder...which is not really needed / missed.

Hello caprongossi, hello felixhause. Thank you very much for your feedback and experience reports. This helps me a lot to assess it.

In 200+ dives I've never had any problems with it fogging up. I only dive in the sea though, so 25+ degrees. As felixhause has already mentioned, it has space for silica gel pads between the camera and the housing. I always use 2 and have never replaced the ones supplied...