Poschengband: Random detection effect?

[TheQuest]

A am playing as grey-mage now and I am at CL26. I have noticed that in time to time it seems that without any casting I get doors, stairs and monsters detection effect. No spell points are used, nor are wands/rods/staffs/scrolls. Nor I step back into DTrap zone.

Is it some kind of hidden talent that is activated in time to time?

[TheQuest]

Edit: it seems that it is not a random effect. I have noticed last time it happened that I also received a message that I do not have any scrolls of magic mapping left.. I bet this auto mapping and detection comes from mogaminator, that uses spare scrolls from my inventory..