This patches fixes a mainquest-breaking bug, in which (understandably) the player took a the companion of a escort-quest, went off-path to use his great skills, and then he becoming lost (bugging away) - never to return again.
The fix: if you load that save again: He will return to you, when you are outside and in the Fort Solid-area. So if your save is in a cave, or in another area: he will return once you re-enter the starting area.
In the future, you can't take him to new areas or caves, he will (understandably) tell you that he is in dire need of rest and wishes to go straight to the fort.
This patch also fixes another related bug. When entering a new cave/dungeon with a companion (which are available later in the game) they will always spawn next to you.*
Sorry for the inconvience!
Best wishes and lots of love! <3
//Mattias
*There is still this bug I want you to be aware of: If you have a companion -> enter a new dungeon -> exit the game without saving -> the companion will be lost. This will be fixed in the future, ofc, its just a bit trickier to fix so it will take longer.