I've found this definition of
"The process of sorting people based on their need for immediate medical treatment as compared to their chance of benefiting from such care."
So I can understand that triaging an issue list means giving some priorities to the items and sorting the list.
But what does triaging an issue mean? Giving it a low priority or the other way round? I suppose the former but haven't found any evidence for it. All the dictionaries I've found deal with triaging some set only.