There are some mapping issues in Halls of Infusion (aside the missing stealth detection, see #470):

Missing Zealot patrol path (G21):
The two Zealots of G21 partolling up and down on the stairs

Missing Zealot after first boss:

After the first boss, when heading towards the frog event there is a Zealot missing. The following screen shots the two dead Zealots with red and orange ingame markers. The missing Zealot is

Before you pull it, it's located on the right when you enter the room. It does not seem to patrol

fixed