Our car has the locking trunk problem. I'll have to check, but it seems like I finally discovered that if passenger door was locked, and I used the trunk release on the drivers door, the trunk would want to relock before I could get to it. I tried several times one day with different procuders when I was in the garage, because it did not relock every time. Of course you don't want it relocking at all, but there seemed to be a way it did not do it.
If it is just a weight issue, it should relock(nearlly) every time.
If it is just a weight issue, it should relock(nearlly) every time.