Lizardman Darter in Slubs Gut's Chamber did a lunging strike with my wiz (holding reactive trip in hand) right in front of it. WAI ?
Related bug from WoodHome adventure: Zombor moved. Zombitude shuffles Zombor tries to trip (missing actors) but fails! Zombitude moved. Zombor moved. Zombish moved. Zomboni moved. The weird part here is that Zombor was 1 square away when it moved and triggered the reactive trip, it wasn't adjacent to my char at all.