I figured it out! If this happens to you just use the I am Stuck option in the menu. The only time I've not had this work is when I spawned in a door somehow and then I used the defeat me option and it spawned me at my last fireplace. super convenient way to fix this kind of problem.
I don't want to state the obvious, but have you tried standing really close to it? like wearing it as a hat close? I've run that dungeon like 50 times (no I haven't gotten the tank btw) and I've been able to search it every time.