See description in the ingame text of a first-aid kit...
"Can only content medical items"!

So it's a bug, my friend! Or the description is wrong.
(... see my 2nd Screenshot i made for you)

I think the game developers have to decide what they want and if that is an undesirable effect (= a bug), or whether the more of a "feature" is.

(translation by google)
Although I had been looking at different terms, I could not find this bug here. So I opened a private, which was now closed with a reference to it here. In order to make these here in the future easier to find, I have tags inserted and my screenshots attached because they again show a different picture of the severity of this bug - for me it is not a small "glow", special much more massive, so I towards sun nothing can be seen.

On the configuration files I have not played around.

It was noticeable that when I changed something in the settings menu on the HDR-switch that the glow then disappeared while until I left the menu again and returned to the game.