Along with the usual lizard minion items, discount card and random mascot items, I always keep a locked in my inventory.

ever since the new shops went live, this one item keeps unlocking itself and disappearing into my shops. None of my other inventory locked items are disappearing, only Merana. WTF is this about?

Same thing is happening to me and it's a pain in the behind.

I just tested a theory, and figured out what's going on. When you quickstock, it moves the first copy of the item (chronologically). So if you have an item locked in your inventory and get another copy of it, quickstock will move the locked item.

I think this same thing was happening with genetech or something at one point?

I had a lizard trap come unlocked the other day, and I really don't think that I clicked unlock on it. But it hasn't happened again, so maybe it's unrelated to this and I really did just misclick.

YES that's what's doing it. I've been testing this and it does only happen when I have another Merana I move out of my inventory.