1.14.154258 (and older versions)

1. Take an improvised shelter kit into hands. Start placing the shelter.
2. Place the shelter very close to an obstacle (another shelter or a wall).
3. Add the necessary material (sticks, pelts...).
4. Try to build it.

->

The game does not show the option to build the shelter (F). I am guessing it's because the collision model does not allow it. If I place the kit just a few inches away, it is the allowed.

It appars that the validation of the place where shelter can be built needs to be enhanced a bit.