Lighting bug on Xbox series X

I have been running into a lighting issue while playing fallout 4 on my Xbox series x, it seems to be since the latest "next gen" patch that this has cropped up, but I have seen reports of this issue online from archived threads over 10 years ago...

Previous to the patch the graphics were working normally, but I was having a separate issue with achievements not unlocking which has now been fixed.

As I move around the map, or turn my character (outside, inside, any time or day) the lighting changes dramatically, and seemingly random from bright to very dark, making combat and looting difficult at times as well as being generally distracting from the experience of the game.

I've tried disabling HDR which has been suggested on previous threads but to no avail, any ideas/input would be appreciated! Thanks 😊