Had you used the 26th April on the street, or have you upgraded from an earlier BETA? FWIW, you're the first report of gear locking not working on an LMM.
In any case my suggestion is to upgrade to the latest BBL beta. Currently that is May 19. We are in the process of creating a new release, so if we can establish there is something not right in May 19 there is a chance it can be fixed for the next release. Alternatively, you can wait until the next release, then test. If there is a problem, it won't be resolved until the release after that - which may be a couple of weeks.
Cheers
Cindy