Playing as Lusotana, I was sieging an eleutheroi settlement (the arevaci one I believe) and I was using siege towers. When one of my units got to the wall, I ordered them to get down to the city level. Instead of going down the staircase to the city level, every one of my men committed suicide by jumping off the wall, and then they all reappeared at the bottom of the siege tower. This happened again when I tried it a second time.
