I seen two Strongboxs but they were both empty. Where are the starting items located? I believe they includes the 2 items that hold energy, 1 seive, 1 sappling...ect There are more items that come when you play single player. If needed i can list them here, but you should beable to just start the single player map and look
Thanks for the report. We expected a few difficulties which is why we did only announce it in a sub forum. We will work on it an figure out a solution until than, you have to find a way around, sorry. I'm quite confident that we will solve the issue today.
I assume that these strongboxes store there content not directly on the block. So it does use some sort of id. As the content in relation to the id can change it might get empty at a certain event. I haven't looked into it and this is just my theory.