I was in layer 2 and was invited to a group. I went and targeted this mob to sell items. My current layer is listed as unknown.

[01:17:16] [LayerHopper] YOU HAVE ENCOUNTERED A MOB THAT BREAKS LAYER HOPPER!
[01:17:16] [LayerHopper] MOB NAME: Dolman Steelfury
[01:17:16] [LayerHopper] MOB GUID: Creature-0-5163-0-6159-5102-00001DAF6D
[01:17:16] [LayerHopper] ZONE: Ironforge, City of Ironforge
[01:17:16] [LayerHopper] PLEASE SEND THIS INFORMATION TO KUTANO (OR REPORT ON GITHUB github.com/psynct/LayerHopper)!