Disappearing door and walls, missing foundation slider, etc?

Hi @CaptainObsession

the foundation sliders have been changed. See this for details: https://answers.ea.com/t5/Technical-Issues-PC/Foundation-Slider-missing/m-p/7166809#M126656

The seasons to pick is only asked the first time you start a new game. Is that where you're seeing this ?

As for your other issues, have you tried repairing your game yet ?

I assume this all happens also on a new save game if you start one for testing purposes ?