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Is it normal for a patio window with a door to have some tile backlash!

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".

• windows