Looting a corpse underwater removes racial infravision
 

Found kind of a weird bug in Lower Guk. Looting the reanimated hand, if the corpse is in the water tube up to his spawn, removes my high elf enchanter's racial infravision - I get dropped down to human-level night vision. It's happened twice in a row so I think it's repeatable. In both cases I had a charmed pet active, not sure if that would be at all relevant. I haven't tried this in other zones yet, but I will report back if it happens underwater in other zones.

Resolving as light sources / racial vision are known issues to staff.