So just woke up in the second and new camp site for Panam's crew and to my suprise my stash box is empty. So the stuff I decided to unload from my inventory into the stash on the 1st location is completely gone if the box isnt still there...
I noticed this too. It's mildly annoying since I hardly go to the apt.
There is zero reason to go to your apartment unless the game forces you to. Your car stash works better, is portable, and can be called up anywhere you want. Even if you use a motorcycle, a single car, just for use as a mobile stash, is worth it, and since you get a whole mess of them for free, there's even less reason to use your apartment stash.