Hello, ps5 user here.
I started having the problem in the end of act 2 but still tolerable (companion not following here n there).
But straight after arriving at Rivington, everytime i go to a different area, the game stop functioning. Especially when moving from rivington to the gate, and to wyrm rock.
When i do not move to a new area but moving within the map that has a lot of npcs, the game freezes for a good 2-3 minutes, and my companions do not follow. Then the game loaded and it was ok but the experience is not good.
I have 2 other runs and about 15 saves in total but still have quite a bit of storage freed up. The internet is working fine when i play other games.
I have stopped playing and wait for a hopefully soon enough update.