NPC sight range bug after sleeping

As i was playing today i encountered a little bug. Whenever a NPC goes to sleep, and wakes up. Their sight range is reduced. I found i can fix this by reloading the game. But, you can see how that is annoying.

I know it isn’t caused by a mod. As I have had this happen across multiple characters, and i change my mods quite frequently. If anyone has a more permanent solution, it would be much appreciated.