We have a larger window and door in the living room facing the patio.
Last time I noticed that when I push and pull on the stud a little bit, there is a small gap between the window frame and the silicone joint to connect the tiles.
Is everything okay or is something not fitting?
Here are some more pictures of my "pushing".
It came off, yes. But that's okay, since the silicone joint only serves a visual purpose.
Meanwhile, silicone seams come apart as the screed dries and has to be refinished. It is quite possible that they are now starting to crack little by little in your home.
How old is the house?