I asked something similar few weeks ago, it happened with me but I didn't have the print. Usually no Monks appear at this place, only where the boss is. What I believe that happened is that this particular Monk appeared exactly at the hole, making him to be with Ice Golems. Similar things can happen with Zulazza.
Edit: This was my question https://www.tibiaqa.com/20103/possible-man-the-cave-appear-exactly-the-hole-and-together-with-ice-golems