Match history builds do not reflect item undo actions

http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/1565027187?tab=builds

The match history display does not reflect ITEM_UNDO events. In this game, if you pull up the JSON for that game, Lucian actually undoes his boots 1 buy, but they show like a normal buy in his build. Wasted about 30 minutes trying to figure out why I was getting different results when everything looked fine, until I looked deeper and realized I was missing ITEM_UNDO (and that the page doesn't show/account for them).

Anyways, not a huge one, and I don't exactly know what you all would do with instances like that, but thought I should pass it along.