This doesn't happen in any version of Lemmings that I know of, so I'd be surprised if Lix did it. *Miners* will turn around if they hit steel or a wrong one-way (due to a glitch in the DOS version, they will turn around if they hit a one-way right wall, even if they're facing right; but they will mine through one-way left walls without a problem as long as they are facing left. This glitch is presumably not present in Lix, definitely not present in Cheapo or Lemmini, *is* present in Lemmix (including LPDOS and Revenge of the Lemmings Lemmix players, but not LPII), and I don't know for sure about anything else).