Right now we have a permanent white glow used for action suggestion by Blizzard. Everything happens in the SetBagItemGlow function, where we need to better get the item for arkinventory.

We had some help from the arkinventory maintainer here :
arkayenro/arkinventory#1193 (comment)

The temporary glow only works with wow retail.

I'm aware but this is a low priority enhancement right now because you can remove the glow by relaunching when there is no grey left.

Hello,

Not sure you've seen this, but the current glow is permanent and not temporary.

Xatrith

The glow is permanent and never removed unless you reload on classic, that's an annoying bug especially because when you reload you loose your teammate's bag content information.